Rework parsing with a focus on the approved changes.
Rework parsing with a focus on the approved changes.

(Yes, someday I'll rework the entire script so it's less of a
single-purpose hack and more of a clean, reuseable piece of code.
That day is not today.)

* tools/dist/backport.pl:
  ("", main): Read in line mode until the "Approved changes" header, and
    in paragraph mode thereafter.

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