MDEV-34220: Add --dir option to mariadb-dump man page

Author: iangilfillan

man/mariadb-dump.1

@@ -1,6 +1,6 @@
 '\" t
 .\"
-.TH "\fBMARIADB-DUMP\fR" "1" "3 September 2024" "MariaDB 11.4" "MariaDB Database System"
+.TH "\fBMARIADB-DUMP\fR" "1" "8 October 2024" "MariaDB 11.6" "MariaDB Database System"
 .\" -----------------------------------------------------------------
 .\" * set default formatting
 .\" -----------------------------------------------------------------
@@ -739,6 +739,26 @@ statement to the server after performing the dump operation\&. This option autom
 .sp -1
 .IP \(bu 2.3
 .\}
+.\" mariadb-dump: dir option
+.\" dirs option: mariadb-dump
+\fB\-\-dir\fR
+.sp
+Parallel dump of multiple databases. Works just like \fB\-\-tab\fR, with regard to output 
+(sql file for table definition and tab-separated for data, same options, e.g \fB\-\-parallel\fR)\&.
+It also allows the \fB\-\-databases\fR and \fB\-\-all-databases\fR options\&. When \fB\-\-dir\fR is used, 
+it creates the directory structure in the output directory pointed to by \fB\-\-dir\fR\&. For 
+every database to be dumped, there will be a directory with the database name\&. All 
+options that \fB\-\-tab\fR supports are also supported by \fB\-\-dir\fR, in particular \fB\-\-parallel\fR\&.
+.RE
+.sp
+.RS 4
+.ie n \{\
+\h'-04'\(bu\h'+03'\c
+.\}
+.el \{\
+.sp -1
+.IP \(bu 2.3
+.\}
 .\" mariadb-dump: disable-keys option
 .\" disable-keys option: mariadb-dump
 \fB\-\-disable\-keys\fR,