* nua: NUTAG_AUTOACK(0) is now obeyed always when media is disabled
Ignore-this: c5960a8330904eae5a1428158e4498c7
If media is enabled, stack autoacks 2XX responses to re-INVITEs unless
NUTAG_AUTOACK(0) is set on handle.
Also documenting NUTAG_AUTOACK() behaviour with re-INVITEs.
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13320 d0543943-73ff-0310-b7d9-9358b9ac24b2