TOOLS-2471 check-copyright should deal with old branches (#40)
TOOLS-2471 check-copyright should deal with old branches (#40)

Reviewed by: John Levon <john.levon@joyent.com>
Reviewed by: Trent Mick <trentm@gmail.com>

joyent/eng,joyent/eng,joyent/eng,joyent/eng,joyent/eng