setup: when possible, build and bundle man pages This makes it so the manual pages are built as part of the Python build, and includes them in any wheel generated. This should make Python wheels a much more useful and complete way of distributing Mercurial binaries. Differential Revision: https://phab.mercurial-scm.org/D9640

scmutil: improve documentation of writereporequirements() This makes it easier to understand the difference between `writerequires()` and `writereporequirements()`. Differential Revision: https://phab.mercurial-scm.org/D9568

command: automatically create alias for command using '-' in names As discussed during the "5.6 Sprint" ignoring dash in command name open the way to using them more. We can now move existing command to more readable (dash using) names without breaking any compatibility. Differential Revision: https://phab.mercurial-scm.org/D9515

worker: POSIX only supports workers from main thread (issue6460) The POSIX backend sets signal handlers for SIGINT (maybe avoidable) and SIGCHLD (necessary for waitpid). Python up to 3.9 only allow this from the main thread, so disable the worker feature otherwise. Differential Revision: https://phab.mercurial-scm.org/D9660

sharesafe: introduce config to disallow outdated shares if upgrade fails After this patch, we have config option to control all aspects of shares when share source is upgraded or downgraded. Differential Revision: https://phab.mercurial-scm.org/D9692

sharesafe: make warning about outdated share configurable If the source repository upgrades to use sharesafe mode, we show a warning in shares. This patch makes that warning configurable and some might not want their users see this warning. Differential Revision: https://phab.mercurial-scm.org/D9691

debuglock: rename flag names to better clarity `--force-lock` sounds as if we are taking the lock however in reality it's the opposite. Differential Revision: https://phab.mercurial-scm.org/D9690