This adds a function to play a different sound when a server becomes
available.
The sound hasn't changed, but now the separate function has been added,
the sound can be changed very easily.
The ticket to create the new sound is at
https://github.com/ZetaGlest/zetaglest-data/issues/44
Can be customized by adding the variable to
$HOME/.zetaglest/glestuser.ini
closes#63
This allows users to set their own sound effects using glestuser.ini
Any values from glest.ini can be used in glestuser.ini, and when in
glestuser.ini, they override the values in glest.ini.
Not yet documented.
This adds only 2 sfx, and shows how to do it.
This will change how #63 is done
