Make mailer.py use the new ACTION revprop-change hook script argument to indicate in the email if the revprop was added, modified or deleted.  Generate diffs for modified revprops.
Make mailer.py use the new ACTION revprop-change hook script argument
to indicate in the email if the revprop was added, modified or
deleted.  Generate diffs for modified revprops.

* tools/hook-scripts/mailer/mailer.py
  (main): Add action parameter and pass it on to PropChange.
  (NamedTemporaryFile): Compatibility implementation for pre 2.3
  pythons.
  (PropChange.__init__): Store the action and cfg parameters.
  (PropChange.generate): Check the action and generate different
  content for added, modified or deleted revprops.
  (usage): Add ACTION to the argument list.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@852237 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion