Some gentle preparatory changes toward merging Atom support into svn2rss.py.
Some gentle preparatory changes toward merging Atom support into svn2rss.py.

* contrib/hook-scripts/svn2rss.py: Change 'RSS' to generic term 'feed' in
    documentation, variable names, AND in the command line option '--rss-file',
    which now becomes '--feed-file'.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@860814 13f79535-47bb-0310-9956-ffa450edef68

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