Comment 1 for bug 1443968

Ignored by innobackupex.pl when it comes to connecting to MySQL.
Suggested fix:

--- a/storage/innobase/xtrabackup/innobackupex.pl
+++ b/storage/innobase/xtrabackup/innobackupex.pl
@@ -2940,7 +2940,7 @@ sub parse_connection_options {
         $con->{dsn} .= ";mysql_read_default_file=$option_defaults_extra_file";
     }

- $con->{dsn} .= ";mysql_read_default_group=xtrabackup";
+ $con->{dsn} .= ";mysql_read_default_group=$option_defaults_group";

     if ($option_mysql_password) {
         $con->{dsn_password} = "$option_mysql_password";