Merge branch 'ps/fewer-perl'

Reduce requirement for Perl in our documentation build and a few
scripts.

* ps/fewer-perl:
  Documentation: stop depending on Perl to generate command list
  Documentation: stop depending on Perl to massage user manual
  request-pull: stop depending on Perl
  filter-branch: stop depending on Perl

diff --cc Documentation/meson.build
Simple merge

diff --cc meson.build
Simple merge