TODO list for MeshLink
----------------------
+* Speed up start: immediately do outgoing connections instead of waiting 5 seconds.
+
* meshlink_join():
- add checks that we only join another mesh if we did not connect to any other node before.
- only allow meshlink_join() when the library thread is not running.
+ - remove old host config file if the invitation gave the node a different name.
* Allow meshlink_open() to be called with a NULL name, in anticipation of meshlink_join().
- Do not allow meshlink_start() if no Name is set.