[Bug 1087697] man page inaccuracy about --sig-proxy and --tty

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1087697

Matthew Heon  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |MODIFIED

--- Comment #13 from Matthew Heon  ---
Upstream rejected the patch proxying signals in TTY mode. Fortunately, they
fixed the inaccuracy in the man pages at the same time.

As of docker-io-1.4.1-5 on F21 and docker-1.4.1-14 on RHEL7, we have these
updated manpages reflecting that signal proxying is incompatible with TTY mode.