Add a "member name" to queue members.

Add a "member name" to queue members.
Add option to the various methods of adding a queue member, to add the "member name".

Member name is used in (most) queue log records, in place of the interface name.
This makes it consistent, so that you can log in from any device, and still be logged as "member name"

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@43316 65c4cc65-6c06-0410-ace0-fbb531ad65f3