Changed e-mail address in example config file
Remove unnecessary _itit() functions from main()
Fix AM_INIT_AUTOMAKE invocation in configure.ac
Add warning about auto-appended DB file extension to example config
Fix DB connection call

* "sqlite" is changed to NULL, so theoretically it is now possible to use any SQL backend GDA supports
* GDA_CONNECTION_OPTIONS_THREAD_SAFE is added as a connection option, just for safety
Add some more debugging messages
Add error checking to some DB functions
Fix return value of a successful wmud_db_load_players() call
Redesign wmud_db_player_save() for GDA