o Add rtpp_anetio_cf, a structure to hold data private to the rtpp_netio_async module;
o Add rtpp_anetio_cf, a structure to hold data private to the
rtpp_netio_async module;

o move other thread-private structures into the "stable" area.
We allocate them on init and then they just stay there, so the pointer
itself is stable.

hongbinz/rtpproxy,Vocalocity/rtpproxy-pre,dsanders11/rtpproxy,jevonearth/rtpproxy,sippy/rtpproxy,jevonearth/rtpproxy,Vocalocity/rtpproxy-pre,hongbinz/rtpproxy,sippy/rtpproxy,synety-jdebp/rtpproxy,dsanders11/rtpproxy,hongbinz/rtpproxy,Vocalocity/rtpproxy-pre,dsanders11/rtpproxy,sippy/rtpproxy,synety-jdebp/rtpproxy,jevonearth/rtpproxy,hongbinz/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,Vocalocity/rtpproxy-pre,jevonearth/rtpproxy