Update realmd.sql

sync realmd.sql with patch file (z2426_sxxxx_xxxxx_01_realmd_relations.sql).
currently realmd.sql is outdated and users need to apply patch to run server.
patch is a good solution when server is already running. but if someone is setting it from the beginning, it should be on the same stage as update files.
please, be more user friendly and apply changes also on "core" sql files, not only on update/patch files.