[9466] Implemented SOAP in MaNGOS

- removed deprecated code from RASocket
- allow more than one login at a time on the RA console
- added gsoap library for handling SOAP requests
- removed deprecated mangos_string entry

Thanks to:
- Derex for reporting a bug which occured if more than 1024
    players were connected  [poll() vs select()]
- caeruleaus for adding windowsbuild support
- vladimir for suggesting a different thread starting order
- fdb_ for suggesting SOAP in the first place

sql/updates/9466_01_mangos_mangos_string.sql

@@ -0,0 +1,3 @@
+ALTER TABLE db_version CHANGE COLUMN required_9464_01_mangos_spell_proc_event required_9466_01_mangos_mangos_string bit;
+
+DELETE FROM mangos_string WHERE entry=60;