sipdump: switch from deprecated /var/run to /run

  The FHS 3.0 [F] has deprecated /var/run in favor of /run. Current
  distributions have done so for a long time (for example in Debian
  since 6.0 “squeeze”), even though they provide a compatibility
  symlink from /var/run to /run. But software like systemd have
  started emitting warnings when using /var/run, for example for
  its PIDFile directive, which pollutes the logs.

src/modules/sipdump/doc/sipdump_admin.xml

@@ -144,7 +144,7 @@ modparam("sipdump", "rotate", 3600)
 		<title>Set <varname>folder</varname> parameter</title>
 		<programlisting format="linespecific">
 ...
-modparam("sipdump", "folder", "/var/run/kamailio")
+modparam("sipdump", "folder", "/run/kamailio")
 ...
 </programlisting>
 		</example>