Added queue strategy "linear". This strategy is useful for those who always wish for their

phones to be rung in a specific order.

(closes issue #7279, reported and initially patched by diLLec, patch reworked by me)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@87154 65c4cc65-6c06-0410-ace0-fbb531ad65f3