[11814]Merge /dnd and /afk auto reply message variables

[Auntie Mangos]

What bug does the patch fix? What features does the patch add?

Merges the /dnd and /afk auto reply message variables into one as you can't be afk and dnd at the same time. Also cleaned up related code. This patch is the follow-up patch of http://getmangos.eu/community/topic/15375/fix-recieving-whispers-while-being-dnd/

For which repository revision was the patch created?

11799

Is there a thread in the bug report section or at lighthouse? If yes, please add a link to the thread.

no

Who has been writing this patch? Please include either forum user names or email addresses.

me

https://gist.github.com/1225696

[Schmoozerd]

In 11814. Thank you