Sat, 16 May 2020 17:00:20 -0400
simple: Convert TCP listener to gio.
Note, this no longer defaults to a fixed range of ports (5060-5160), but
that appears unnecessary. The SIP RFC3261 says that 5060 is the default
if a port is not specified, but we always include our port in the Via
header. Thus there's no reason to restrict ports to any particular
range.