Move dynamic supervisord log location to /log
Formating cleanup
Enable rpcinterface:supervisor due to funky namespace strategies.
Set startsecs and startretries to 0
No default sshd startup.

Only download keys and start ssh daemon if GH_USER is set.
Change location of socketfile. Undo other experiments.

Custom socketfile location for spoke-only access in /var/local/run.
/run is used by the hub as a whole.