Switch the devicestate thread to operate the same way as the logging thread....

Switch the devicestate thread to operate the same way as the logging thread. Pops all entries off the list to be processed, resets the list back to a clean state, and processes each entry. The thread won't have to acquire the list lock again until it checks to see if there are more to process.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@53112 65c4cc65-6c06-0410-ace0-fbb531ad65f3