support-files/mysql.server.sh : Fix the startup sequence. bug#18810 + bug#20118

support-files/mysql.server.sh:
  Ensure that some necessary / useful system services have been started already,
  when the MySQL server is started. 
  This fixes bug#18810 and bug#20118

support-files/mysql.server.sh

@@ -17,6 +17,7 @@
 ### BEGIN INIT INFO
 # Provides: mysql
 # Required-Start: $local_fs $network $remote_fs
+# Should-Start: ypbind nscd ldap ntpd xntpd
 # Required-Stop: $local_fs $network $remote_fs
 # Default-Start:  2 3 4 5
 # Default-Stop: 0 1 6