[Bug 1087700] lost signals when sending lots of signals using --sig-proxy to docker

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1087700

--- Comment #4 from Daniel Walsh  ---
Ok sorry about that, I was doing a lot of cleanup yesterday and screwed up. 
This is the one we agreed would be a documentation issue correct.  IE Just
document which signals do not work?