perf: add a --update-last flag to perf::tags See inline documentation for details.

perf: add a `--clear-fnode-cache-rev` argument to perf::tags This will help us test this in situation closer to an update after a commit or a push.

perf: introduce more cache invalidation option in perf::tags This will help us to assert the performance of different versions in more diverse situations. We introduce helper function in the tags module in case invalidating such cache becomes different in the future.

hgweb: pass strings in WSGI environment correctly from wsgicgi According to PEP 3333, the strings in the WSGI environment must be translatable to bytes using the ISO-8859-1 codec.

branching: merge stable into default

Added signature for changeset 5a8b54201039

Added tag 6.5.2 for changeset 5a8b54201039

relnotes: add 6.5.2

run-tests: detect HGWITHRUSTEXT value Without this, some manual check in tests/test-dirstate.t could get confused by the lack of `rust` in module policy and break the test.

tests: avoid test environment affecting setup.py In particular [RHG_FALLBACK_EXECUTABLE] is being set prematurely, before rhg is built, but probably the rest of the env changes don't help, either.