Add note on 'non-binding' votes by partial committers.
Add note on 'non-binding' votes by partial committers.

* www/hacking.html
  (release-stabilization): Add a note on voting by partial committers for
   a different area by specifying 'non-binding' in STATUS file, based on:
   http://svn.haxx.se/dev/archive-2005-04/1670.shtml

Approved by: stsp

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion