As per ToDo list, I have made it so that Wait(), WaitExten(), Congestion(),...

As per ToDo list, I have made it so that Wait(), WaitExten(), Congestion(), Busy(), Read(), WaitForRing(), will now either actually handle a floating point argument as advertised, or has been upgraded to accept a floating point [timeout] arg.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@44435 65c4cc65-6c06-0410-ace0-fbb531ad65f3