Handle all log from runc and collect goroutines.
Handle all log from runc and collect goroutines.

Also, spent a large amount of time researching potential mitigation strategies for runc's frustrating double-usage of stderr, but have essentially concluded it's not possible to win without extremophile hacks.  (Even trying to do a "good enough" timeout is really out of bounds: tests indicated anything less than 200ms was still entirely too likely to cause trouble, and that's an exhorbitantly huge minimal latency to put on time-till-first-byte.)  More upstream work required to make grace possible.

Signed-off-by: Eric Myhre <2346ad27d7568ba9896f1b7da6b5991251debdf2@exultant.us>

subuser-security/repeatr,polydawn/repeatr,subuser-security/repeatr,polydawn/repeatr