Merge bitcoin/bitcoin#24263: doc: Fix gen-manpages, rewrite in Python

87f54060ff doc: Swap gen-manpages and update RC steps in release process (laanwj)
42c202893b doc: Fix gen-manpages, rewrite in Python (laanwj)

Pull request description:

  Rewrite the manual page generation script in Python.

  This:
  - solves '-' stripping issue (fixes #22681)
  - makes that a copyright footer is generated correctly again

  Also change the release process to swap gen-manpages and update RC steps, so that the pages will have the correct rc and/or final version.

ACKs for top commit:
  dongcarl:
    Code Review ACK 87f54060ff
  fanquake:
    ACK 87f54060ff - tested generating and opening the man pages locally, but didn't run through the release process. Will propose some changes to address consolidating the help / version output.

Tree-SHA512: 39254721ca84e4f223a321c554f2e08c36428b15019a0f9fa3eff408b4c6f1e1d74941143f4d2927427afa3ad7a7e6f999d6ec660132d817809b640a87ae9f7d

doc/release-process.md

@@ -6,13 +6,14 @@ Release Process
 ### Before every release candidate
 
 * Update translations see [translation_process.md](https://github.com/bitcoin/bitcoin/blob/master/doc/translation_process.md#synchronising-translations).
-* Update manpages, see [gen-manpages.sh](https://github.com/bitcoin/bitcoin/blob/master/contrib/devtools/README.md#gen-manpagessh).
 * Update release candidate version in `configure.ac` (`CLIENT_VERSION_RC`).
+* Update manpages (after rebuilding the binaries), see [gen-manpages.py](https://github.com/bitcoin/bitcoin/blob/master/contrib/devtools/README.md#gen-manpagespy).
 
 ### Before every major and minor release
 
 * Update [bips.md](bips.md) to account for changes since the last release (don't forget to bump the version number on the first line).
 * Update version in `configure.ac` (don't forget to set `CLIENT_VERSION_RC` to `0`).
+* Update manpages (see previous section)
 * Write release notes (see "Write the release notes" below).
 
 ### Before every major release