- routers can now opt to extend their enrollment at any time with a
previous or new key
- adds tests for router enrollment
- adds tests for router enrollment extension
- edge router sync is now modular and can have different strategies
- plans to make this configurabe in the future with multiple strat
- legacy strategy is called "instant" and is the only option
- instant strat now supports control signaling and resync requests
- edge routers now do not remove connections till after a full sync
- added the ability for the controller to report the er sync status
- added er syn status to GET /edge-routers list and detail
- improved log output in sync logic
- http requests should hard timeout w/ a reasonable response
- edge routers should close when an API session token is not provided or
does not match
- stream both types of sessions on edge router connect
- stream sessions for time out processing/deletion
- add id to session messages (edge control pb update, breaks backwards
compat)