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release-7.4.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!-- Dernière modification
le $Date: 2009-05-03 13:57:02 +0200 (dim. 03 mai 2009) $
par $Author: gleu $
révision $Revision: 1317 $ -->
<sect1 id="release-7-4-30">
<title>Release 7.4.30</title>
<note>
<title>Release date</title>
<simpara>2010-10-04</simpara>
</note>
<para>
This release contains a variety of fixes from 7.4.29.
For information about new features in the 7.4 major release, see
<xref linkend="release-7-4"/>.
</para>
<para>
This is expected to be the last <productname>PostgreSQL</productname> release
in the 7.4.X series. Users are encouraged to update to a newer
release branch soon.
</para>
<sect2>
<title>Migration to Version 7.4.30</title>
<para>
A dump/restore is not required for those running 7.4.X.
However, if you are upgrading from a version earlier than 7.4.26,
see the release notes for 7.4.26.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Use a separate interpreter for each calling SQL userid in PL/Perl and
PL/Tcl (Tom Lane)
</para>
<para>
This change prevents security problems that can be caused by subverting
Perl or Tcl code that will be executed later in the same session under
another SQL user identity (for example, within a <literal>SECURITY
DEFINER</literal> function). Most scripting languages offer numerous ways that
that might be done, such as redefining standard functions or operators
called by the target function. Without this change, any SQL user with
Perl or Tcl language usage rights can do essentially anything with the
SQL privileges of the target function's owner.
</para>
<para>
The cost of this change is that intentional communication among Perl
and Tcl functions becomes more difficult. To provide an escape hatch,
PL/PerlU and PL/TclU functions continue to use only one interpreter
per session. This is not considered a security issue since all such
functions execute at the trust level of a database superuser already.
</para>
<para>
It is likely that third-party procedural languages that claim to offer
trusted execution have similar security issues. We advise contacting
the authors of any PL you are depending on for security-critical
purposes.
</para>
<para>
Our thanks to Tim Bunce for pointing out this issue (CVE-2010-3433).
</para>
</listitem>
<listitem>
<para>
Prevent possible crashes in <function>pg_get_expr()</function> by disallowing
it from being called with an argument that is not one of the system
catalog columns it's intended to be used with
(Heikki Linnakangas, Tom Lane)
</para>
</listitem>
<listitem>
<para>
Fix <quote>cannot handle unplanned sub-select</quote> error (Tom Lane)
</para>
<para>
This occurred when a sub-select contains a join alias reference that
expands into an expression containing another sub-select.
</para>
</listitem>
<listitem>
<para>
Take care to fsync the contents of lockfiles (both
<filename>postmaster.pid</filename> and the socket lockfile) while writing them
(Tom Lane)
</para>
<para>
This omission could result in corrupted lockfile contents if the
machine crashes shortly after postmaster start. That could in turn
prevent subsequent attempts to start the postmaster from succeeding,
until the lockfile is manually removed.
</para>
</listitem>
<listitem>
<para>
Improve <filename>contrib/dblink</filename>'s handling of tables containing
dropped columns (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Fix connection leak after <quote>duplicate connection name</quote>
errors in <filename>contrib/dblink</filename> (Itagaki Takahiro)
</para>
</listitem>
<listitem>
<para>
Update build infrastructure and documentation to reflect the source code
repository's move from CVS to Git (Magnus Hagander and others)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-29">
<title>Release 7.4.29</title>
<note>
<title>Release date</title>
<simpara>2010-05-17</simpara>
</note>
<para>
This release contains a variety of fixes from 7.4.28.
For information about new features in the 7.4 major release, see
<xref linkend="release-7-4"/>.
</para>
<para>
The <productname>PostgreSQL</productname> community will stop releasing updates
for the 7.4.X release series in July 2010.
Users are encouraged to update to a newer release branch soon.
</para>
<sect2>
<title>Migration to Version 7.4.29</title>
<para>
A dump/restore is not required for those running 7.4.X.
However, if you are upgrading from a version earlier than 7.4.26,
see the release notes for 7.4.26.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Enforce restrictions in <literal>plperl</literal> using an opmask applied to
the whole interpreter, instead of using <filename>Safe.pm</filename>
(Tim Bunce, Andrew Dunstan)
</para>
<para>
Recent developments have convinced us that <filename>Safe.pm</filename> is too
insecure to rely on for making <literal>plperl</literal> trustable. This
change removes use of <filename>Safe.pm</filename> altogether, in favor of using
a separate interpreter with an opcode mask that is always applied.
Pleasant side effects of the change include that it is now possible to
use Perl's <literal>strict</literal> pragma in a natural way in
<literal>plperl</literal>, and that Perl's <literal>$a</literal> and <literal>$b</literal>
variables work as expected in sort routines, and that function
compilation is significantly faster. (CVE-2010-1169)
</para>
</listitem>
<listitem>
<para>
Prevent PL/Tcl from executing untrustworthy code from
<structname>pltcl_modules</structname> (Tom)
</para>
<para>
PL/Tcl's feature for autoloading Tcl code from a database table
could be exploited for trojan-horse attacks, because there was no
restriction on who could create or insert into that table. This change
disables the feature unless <structname>pltcl_modules</structname> is owned by a
superuser. (However, the permissions on the table are not checked, so
installations that really need a less-than-secure modules table can
still grant suitable privileges to trusted non-superusers.) Also,
prevent loading code into the unrestricted <quote>normal</quote> Tcl
interpreter unless we are really going to execute a <literal>pltclu</literal>
function. (CVE-2010-1170)
</para>
</listitem>
<listitem>
<para>
Do not allow an unprivileged user to reset superuser-only parameter
settings (Alvaro)
</para>
<para>
Previously, if an unprivileged user ran <literal>ALTER USER ... RESET
ALL</literal> for himself, or <literal>ALTER DATABASE ... RESET ALL</literal> for
a database he owns, this would remove all special parameter settings
for the user or database, even ones that are only supposed to be
changeable by a superuser. Now, the <command>ALTER</command> will only
remove the parameters that the user has permission to change.
</para>
</listitem>
<listitem>
<para>
Avoid possible crash during backend shutdown if shutdown occurs
when a <literal>CONTEXT</literal> addition would be made to log entries (Tom)
</para>
<para>
In some cases the context-printing function would fail because the
current transaction had already been rolled back when it came time
to print a log message.
</para>
</listitem>
<listitem>
<para>
Update pl/perl's <filename>ppport.h</filename> for modern Perl versions
(Andrew)
</para>
</listitem>
<listitem>
<para>
Fix assorted memory leaks in pl/python (Andreas Freund, Tom)
</para>
</listitem>
<listitem>
<para>
Ensure that <filename>contrib/pgstattuple</filename> functions respond to cancel
interrupts promptly (Tatsuhito Kasahara)
</para>
</listitem>
<listitem>
<para>
Make server startup deal properly with the case that
<function>shmget()</function> returns <literal>EINVAL</literal> for an existing
shared memory segment (Tom)
</para>
<para>
This behavior has been observed on BSD-derived kernels including OS X.
It resulted in an entirely-misleading startup failure complaining that
the shared memory request size was too large.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-28">
<title>Release 7.4.28</title>
<note>
<title>Release date</title>
<simpara>2010-03-15</simpara>
</note>
<para>
This release contains a variety of fixes from 7.4.27.
For information about new features in the 7.4 major release, see
<xref linkend="release-7-4"/>.
</para>
<para>
The <productname>PostgreSQL</productname> community will stop releasing updates
for the 7.4.X release series in July 2010.
Users are encouraged to update to a newer release branch soon.
</para>
<sect2>
<title>Migration to Version 7.4.28</title>
<para>
A dump/restore is not required for those running 7.4.X.
However, if you are upgrading from a version earlier than 7.4.26,
see the release notes for 7.4.26.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Add new configuration parameter <varname>ssl_renegotiation_limit</varname> to
control how often we do session key renegotiation for an SSL connection
(Magnus)
</para>
<para>
This can be set to zero to disable renegotiation completely, which may
be required if a broken SSL library is used. In particular, some
vendors are shipping stopgap patches for CVE-2009-3555 that cause
renegotiation attempts to fail.
</para>
</listitem>
<listitem>
<para>
Make <function>substring()</function> for <type>bit</type> types treat any negative
length as meaning <quote>all the rest of the string</quote> (Tom)
</para>
<para>
The previous coding treated only -1 that way, and would produce an
invalid result value for other negative values, possibly leading to
a crash (CVE-2010-0442).
</para>
</listitem>
<listitem>
<para>
Fix some cases of pathologically slow regular expression matching (Tom)
</para>
</listitem>
<listitem>
<para>
When reading <filename>pg_hba.conf</filename> and related files, do not treat
<literal>@something</literal> as a file inclusion request if the <literal>@</literal>
appears inside quote marks; also, never treat <literal>@</literal> by itself
as a file inclusion request (Tom)
</para>
<para>
This prevents erratic behavior if a role or database name starts with
<literal>@</literal>. If you need to include a file whose path name
contains spaces, you can still do so, but you must write
<literal>@"/path to/file"</literal> rather than putting the quotes around
the whole construct.
</para>
</listitem>
<listitem>
<para>
Prevent infinite loop on some platforms if a directory is named as
an inclusion target in <filename>pg_hba.conf</filename> and related files
(Tom)
</para>
</listitem>
<listitem>
<para>
Ensure PL/Tcl initializes the Tcl interpreter fully (Tom)
</para>
<para>
The only known symptom of this oversight is that the Tcl
<literal>clock</literal> command misbehaves if using Tcl 8.5 or later.
</para>
</listitem>
<listitem>
<para>
Prevent crash in <filename>contrib/dblink</filename> when too many key
columns are specified to a <function>dblink_build_sql_*</function> function
(Rushabh Lathia, Joe Conway)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-27">
<title>Release 7.4.27</title>
<note>
<title>Release date</title>
<simpara>2009-12-14</simpara>
</note>
<para>
This release contains a variety of fixes from 7.4.26.
For information about new features in the 7.4 major release, see
<xref linkend="release-7-4"/>.
</para>
<sect2>
<title>Migration to Version 7.4.27</title>
<para>
A dump/restore is not required for those running 7.4.X.
However, if you are upgrading from a version earlier than 7.4.26,
see the release notes for 7.4.26.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Protect against indirect security threats caused by index functions
changing session-local state (Gurjeet Singh, Tom)
</para>
<para>
This change prevents allegedly-immutable index functions from possibly
subverting a superuser's session (CVE-2009-4136).
</para>
</listitem>
<listitem>
<para>
Reject SSL certificates containing an embedded null byte in the common
name (CN) field (Magnus)
</para>
<para>
This prevents unintended matching of a certificate to a server or client
name during SSL validation (CVE-2009-4034).
</para>
</listitem>
<listitem>
<para>
Fix possible crash during backend-startup-time cache initialization (Tom)
</para>
</listitem>
<listitem>
<para>
Prevent signals from interrupting <literal>VACUUM</literal> at unsafe times
(Alvaro)
</para>
<para>
This fix prevents a PANIC if a <literal>VACUUM FULL</literal> is cancelled
after it's already committed its tuple movements, as well as transient
errors if a plain <literal>VACUUM</literal> is interrupted after having
truncated the table.
</para>
</listitem>
<listitem>
<para>
Fix possible crash due to integer overflow in hash table size
calculation (Tom)
</para>
<para>
This could occur with extremely large planner estimates for the size of
a hashjoin's result.
</para>
</listitem>
<listitem>
<para>
Fix very rare crash in <type>inet</type>/<type>cidr</type> comparisons (Chris
Mikkelson)
</para>
</listitem>
<listitem>
<para>
Fix PAM password processing to be more robust (Tom)
</para>
<para>
The previous code is known to fail with the combination of the Linux
<literal>pam_krb5</literal> PAM module with Microsoft Active Directory as the
domain controller. It might have problems elsewhere too, since it was
making unjustified assumptions about what arguments the PAM stack would
pass to it.
</para>
</listitem>
<listitem>
<para>
Make the postmaster ignore any <literal>application_name</literal> parameter in
connection request packets, to improve compatibility with future libpq
versions (Tom)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-26">
<title>Release 7.4.26</title>
<note>
<title>Release date</title>
<simpara>2009-09-09</simpara>
</note>
<para>
This release contains a variety of fixes from 7.4.25.
For information about new features in the 7.4 major release, see
<xref linkend="release-7-4"/>.
</para>
<sect2>
<title>Migration to Version 7.4.26</title>
<para>
A dump/restore is not required for those running 7.4.X.
However, if you have any hash indexes on <type>interval</type> columns,
you must <command>REINDEX</command> them after updating to 7.4.26.
Also, if you are upgrading from a version earlier than 7.4.11,
see the release notes for 7.4.11.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<listitem>
<para>
Disallow <command>RESET ROLE</command> and <command>RESET SESSION
AUTHORIZATION</command> inside security-definer functions (Tom, Heikki)
</para>
<para>
This covers a case that was missed in the previous patch that
disallowed <command>SET ROLE</command> and <command>SET SESSION
AUTHORIZATION</command> inside security-definer functions.
(See CVE-2007-6600)
</para>
</listitem>
<listitem>
<para>
Fix handling of sub-SELECTs appearing in the arguments of
an outer-level aggregate function (Tom)
</para>
</listitem>
<listitem>
<para>
Fix hash calculation for data type <type>interval</type> (Tom)
</para>
<para>
This corrects wrong results for hash joins on interval values.
It also changes the contents of hash indexes on interval columns.
If you have any such indexes, you must <command>REINDEX</command> them
after updating.
</para>
</listitem>
<listitem>
<para>
Fix overflow for <literal>INTERVAL '<replaceable>x</replaceable> ms'</literal>
when <replaceable>x</replaceable> is more than 2 million and integer
datetimes are in use (Alex Hunsaker)
</para>
</listitem>
<listitem>
<para>
Fix calculation of distance between a point and a line segment (Tom)
</para>
<para>
This led to incorrect results from a number of geometric operators.
</para>
</listitem>
<listitem>
<para>
Fix <type>money</type> data type to work in locales where currency
amounts have no fractional digits, e.g. Japan (Itagaki Takahiro)
</para>
</listitem>
<listitem>
<para>
Properly round datetime input like
<literal>00:12:57.9999999999999999999999999999</literal> (Tom)
</para>
</listitem>
<listitem>
<para>
Fix poor choice of page split point in GiST R-tree operator classes
(Teodor)
</para>
</listitem>
<listitem>
<para>
Fix portability issues in plperl initialization (Andrew Dunstan)
</para>
</listitem>
<listitem>
<para>
Improve robustness of <application>libpq</application>'s code to recover
from errors during <command>COPY FROM STDIN</command> (Tom)
</para>
</listitem>
<listitem>
<para>
Avoid including conflicting readline and editline header files
when both libraries are installed (Zdenek Kotala)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-25">
<title>Version 7.4.25</title>
<note>
<title>Date de version</title>
<simpara>2009-03-16</simpara>
</note>
<para>
Cette version contient des corrections de la version 7.4.24.
Pour plus d'informations sur les nouvelles fonctionnalités de la
version majeure 7.4, voir <xref linkend="release-7-4"/>.
</para>
<sect2>
<title>Migration vers la version 7.4.25</title>
<para>
Une sauvegarde/restauration n'est pas requise pour ceux utilisant une
version 7.4.X. Néanmoins, si vous mettez à jour à partir d'une version
antérieure à la 7.4.11, voir les notes de sortie de la 7.4.11.
</para>
</sect2>
<sect2>
<title>Modifications</title>
<itemizedlist>
<listitem>
<para>
Correction de crashs suite à des récursions erronées dûes à l'échec d'une
conversion d'encodage (Tom)
</para>
<para>
Cette modification étend les corrections réalisées lors des deux
précédentes versions mineures pour les même scénarios. Les corrections
déjà réalisées étaient ciblées sur les problèmes rencontrés, mais nous
nous apercevons maintenant que <emphasis>toute</emphasis> erreur renvoyée
par une fonction de conversion d'encodage pouvait entraîner une récursion
infinie pour indiquer l'erreur. La solution est donc de désactiver toute
traduction et conversion d'encodage. Le message d'erreur est renvoyé en
ASCII simple si nous découvrons que nous sommes dans une situation
susceptible d'entraîner une récursion infinie.
(CVE-2009-0922)
</para>
</listitem>
<listitem>
<para>
N'autorise plus <command>CREATE CONVERSION</command> avec les mauvais
encodages pour la fonction de conversion spécifiée (Heikki)
</para>
<para>
Ceci permet de prévenir un scénario possible pour un échec de conversion
d'encodage. Le changement précédent permet de se protéger contre les
autres échecs du même type.
</para>
</listitem>
<listitem>
<para>
Correction d'un crash lorsque <function>to_char()</function> a pour
argument des codes de format inappropriés pour la donnée en argument
(Tom)
</para>
</listitem>
<listitem>
<para>
Ajout de <literal>MUST</literal> (Mauritius Island Summer Time) dans la
liste par défaut des abréviations connues de fuseau horaire (Xavier
Bugaud)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-24">
<title>Version 7.4.24</title>
<note>
<title>Date de version</title>
<simpara>2009-02-02</simpara>
</note>
<para>
Cette version contient des corrections de la version 7.4.23.
Pour plus d'informations sur les nouvelles fonctionnalités de la
version majeure 7.4, voir <xref linkend="release-7-4"/>.
</para>
<sect2>
<title>Migration vers la version 7.4.24</title>
<para>
Une sauvegarde/restauration n'est pas requise pour ceux utilisant une
version 7.4.X. Néanmoins, si vous mettez à jour à partir d'une version
antérieure à la 7.4.11, voir les notes de sortie de la 7.4.11.
</para>
</sect2>
<sect2>
<title>Changements</title>
<itemizedlist>
<listitem>
<para>
Amélioration de la gestion des URL dans la fonction
<function>headline()</function> (Teodor)
</para>
</listitem>
<listitem>
<para>
Amélioration de la gestion des lignes trop longues dans la fonction
<function>headline()</function> (Teodor)
</para>
</listitem>
<listitem>
<para>
Empêche des échecs ou des mauvaises conversions avec Assert si une
conversion d'encodage est créé avec la mauvaise fonction de conversion
pour la paire spécifiée des encodages (Tom, Heikki)
</para>
</listitem>
<listitem>
<para>
Évite un verrou inutile des petites tables dans <command>VACUUM</command>
(Heikki)
</para>
</listitem>
<listitem>
<para>
Correction de variables non initialisées dans la fonction
<function>get_covers()</function> de <filename>contrib/tsearch2</filename>
(Teodor)
</para>
</listitem>
<listitem>
<para>
Correction d'un bogue dans la gestion de <function>to_char()</function>
pour les codes de format <literal>TH</literal> (Andreas Scherbaum)
</para>
</listitem>
<listitem>
<para>
Toute la documentation référence maintenant <literal>pgsql-bugs</literal>
et/ou <literal>pgsql-hackers</literal>, au lieu des listes obsolètes comme
<literal>pgsql-ports</literal> et <literal>pgsql-patches</literal> (Tom)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-23">
<title>Version 7.4.23</title>
<note>
<title>Date de sortie</title>
<simpara>2008-11-03</simpara>
</note>
<para>
Cette version contient des corrections de la version 7.4.22.
Pour plus d'informations sur les nouvelles fonctionnalités de la
version majeure 7.4, voir <xref linkend="release-7-4"/>.
</para>
<sect2>
<title>Migration vers la version 7.4.23</title>
<para>
Une sauvegarde/restauration n'est pas requise pour ceux utilisant une
version 7.4.X. Néanmoins, si vous mettez à jour à partir d'une version
antérieure à la 7.4.11, voir les notes de sortie de la 7.4.11.
</para>
</sect2>
<sect2>
<title>Modifications</title>
<itemizedlist>
<listitem>
<para>
Correction d'un crash du serveur lorsque l'encodage client ne peut pas
représenter une version convertie du message d'erreur (Tom)
</para>
<para>
Nous avons déjà corrigé des problèmes identiques dans le passé, mais le
problème est toujours d'actualité si le message <quote>le caratère n'a
pas d'équivalent</quote> ne peut pas être converti. La correction revient à
désactiver la transformation et à renvoyer le message d'erreur en ASCII
brut quand nous détectons cette situation.
</para>
</listitem>
<listitem>
<para>
Correction de la génération du résumé (« headline ») par tsearch2 quand
l'élément de la requête correspond au premier mot d'un texte (Sushant
Sinha)
</para>
</listitem>
<listitem>
<para>
Correction de l'affichage de secondes fractionnées dans des valeurs
d'intervalle lors de l'utilisation d'un style de date non ISO dans une
construction ayant utilisé l'option <option>--enable-integer-datetimes</option>
(Ron Mayer)
</para>
</listitem>
<listitem>
<para>
S'assure que <function>SPI_getvalue</function> et <function>SPI_getbinval</function>
fonctionnent correctement lorsque la ligne et le descripteur de ligne
passés ont un nombre de colonnes différent (Tom)
</para>
<para>
Cette situation est normale quand une table se voit ajouter ou supprimer
des colonnes, mais ces deux fonctions ne le géraient pas correctement.
La seule conséquence probable est l'envoi d'un message d'erreur erroné.
</para>
</listitem>
<listitem>
<para>
Correction de l'analyse de <command>CREATE USER</command> par
<application>ecpg</application> (Michael)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-22">
<title>Version 7.4.22</title>
<note>
<title>Date de sortie</title>
<simpara>2008-09-22</simpara>
</note>
<para>
This release contains a variety of fixes from 7.4.21.
Pour plus d'informations sur les nouvelles fonctionnalités de la
version majeure 7.4, voir <xref linkend="release-7-4"/>.
</para>
<sect2>
<title>Migration vers la version 7.4.22</title>
<para>
Une sauvegarde/restauration n'est pas nécessaire aux utilisateurs de la version 7.4.X.
However, if you are upgrading from a version earlier than 7.4.11,
see the release notes for 7.4.11.
</para>
</sect2>
<sect2>
<title>Modifications</title>
<itemizedlist>
<listitem>
<para>
Fix datetime input functions to correctly detect integer overflow when
running on a 64-bit platform (Tom)
</para>
</listitem>
<listitem>
<para>
Improve performance of writing very long log messages to syslog (Tom)
</para>
</listitem>
<listitem>
<para>
Fix bug in backwards scanning of a cursor on a <literal>SELECT DISTINCT
ON</literal> query (Tom)
</para>
</listitem>
<listitem>
<para>
Fix planner to estimate that <literal>GROUP BY</literal> expressions yielding
boolean results always result in two groups, regardless of the
expressions' contents (Tom)
</para>
<para>
This is very substantially more accurate than the regular <literal>GROUP
BY</literal> estimate for certain boolean tests like <replaceable>col</replaceable>
<literal>IS NULL</literal>.
</para>
</listitem>
<listitem>
<para>
Improve <application>pg_dump</application> and <application>pg_restore</application>'s
error reporting after failure to send a SQL command (Tom)
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-7-4-21">
<title>Version 7.4.21</title>
<note>
<title>Date de sortie</title>
<simpara>2008-06-12</simpara>
</note>
<para>
This release contains one serious bug fix over 7.4.20.
Pour plus d'informations sur les nouvelles fonctionnalités de la
version majeure 7.4, voir <xref linkend="release-7-4"/>.