[Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1096269
Bug 1096269 depends on bug 1087697, which changed state.

Bug 1087697 Summary: man page inaccuracy about --sig-proxy and --tty
https://bugzilla.redhat.com/show_bug.cgi?id=1087697

What    |Removed                     |Added
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             Status|MODIFIED                    |CLOSED
         Resolution|---                         |EOL