plugin IP discovery: better IP discovering: - locals and external IP addresses can be discovered - if netifaces is available, it is used - same thing for NAT Port plugin - cache is no more managed per profile but globally, a signal or observer will be used in the future to detect connection changes

Use this module to temporary store files that need to be integrated to other
projects such as Wokkel.

For example, the changeset that introduced this folder adds RSM (XEP-0059)
support to Wokkel. The files in sat.tmp.wokkel are imported over the initial
wokkel files from sat.plugins.__init__.py