automation: create Python 3.5 variant of requirements.txt The automation environment is refusing to build with the previous file because some dependencies won't install on Python 3.5. I couldn't find an easy way to salvage the situation with a single requirements.txt file. So, I decided to introduce a variant for Python 3.5. As part of this, we update packages to latest versions. (I do question why we are still supporting Python 3.5...) Differential Revision: https://phab.mercurial-scm.org/D10690

hgweb: Fix deprecation warning in Python 3.10 (issue6520) Differential Revision: https://phab.mercurial-scm.org/D10711

dirstate-tree: Remove newly-empty nodes after removing a `DirstateEntry` This is actually necessary to make `DirstateMap::has_dir` correct, since it assumes that a node without a `DirstateEntry` has at least one descedant node with a `DirstateEntry`. This bug would become apparent when a later changeset persists tree nodes on disk in the "dirstate-v2" format. Differential Revision: https://phab.mercurial-scm.org/D10706

dirstate-tree: Refactor DirstateMap::drop_file to be recursive It should behave the same as before. This will enable the next changeset to run code on the way "down" (in order to removing newly-empty nodes). Differential Revision: https://phab.mercurial-scm.org/D10705

templates: fix `revset('parents()') % ...` in amend message template I don't understand why, but putting `revset('parents()') % {desc}` in the commit message template for amend resulted in a crash because `memctx.hex()` did `hex(self.node())` and its node was None. This patch fixes that. Martin von Zweigbergk <martinvonz@google.com> Differential Revision: https://phab.mercurial-scm.org/D10707

path: teach the `hg path` command to display boolean sub-option The next changeset introduce one. Differential Revision: https://phab.mercurial-scm.org/D10450

parselist: move the function from config to stringutil We move the function in a lower level module to avoid cycle. It moves next to `parsebool` who had to migrate for the same reasons. Differential Revision: https://phab.mercurial-scm.org/D10449

bookmark: use `list_paths` to access path definition The content of the `[paths]` config section is receiving transformation that make it hard to recognise whats the actual name, and the next changeset will make it worse. So we use the official API for this instead. Differential Revision: https://phab.mercurial-scm.org/D10448

urlutil: make `paths` class old list of `path` We move from a `{name → path}` mapping to a `{name → [path]}` mapping. And update all user code accordingly. For now, all the list contains exactly one element, but we are now in a good place to make the config understand a list of url. Differential Revision: https://phab.mercurial-scm.org/D10447

urlutil: extract `chain_path` in a function This will no longer modify `path` inplace so it does not make much sense as a method. Differential Revision: https://phab.mercurial-scm.org/D10446