Use my.cnf file from datadir even if datadir is different from the default one.

support-files/mysql.server.sh

@@ -118,7 +118,18 @@ else
   test -z "$print_defaults" && print_defaults="my_print_defaults"
 fi
 
-parse_arguments `$print_defaults mysqld mysql_server mysql.server`
+#
+# Test if someone changed datadir;  In this case we should also read the
+# default arguments from this directory
+#
+
+extra_args=""
+if test "$datadir" != "@localstatedir@"
+then
+  extra_args="-e $datadir/my.cnf"
+fi
+
+parse_arguments `$print_defaults $extra_args mysqld mysql_server mysql.server`
 
 # Safeguard (relative paths, core dumps..)
 cd $basedir