Added Hivebrain labels

I found myself doing this for the second time, so I decided to make it
the last.

I also renamed Snd_FadeOutSFX and Snd_FadeOutSFX2. The Snd prefix is
unnecessary and clashes with similar code's labels, and SFX2 focuses on
Special SFXes.

Also added cfSetCommunication's previous label.
Merge pull request #2 from Clownacy/master

Added Hivebrain labels