robertmaynard/Remus — pull request #48 by robertmaynard (2014-07-10 13:11:03+00:00)
Title: Only reset the signal to the default if we overrode them to begin.

When we don't override signal catching, we should presume the calling code
has installed custom signal catching hooks, and they won't want us to reset
the hooks after brokering has stopped.

Change-Id: I7fd80efdf3aa4bf04f5054361e862db2250a9b08