rust: add a pointer for profiling to the README As figuring out how to get useful profiles is not obvious. Differential Revision: https://phab.mercurial-scm.org/D8603

rust: update the mention of hgcli in rust/README.rst This may not be exactly right, but it's better than before. Differential Revision: https://phab.mercurial-scm.org/D8602

sslutil: fix comment to use inclusive or instead of exclusive or The incorrect "either" was introduced by one of my recent patches.

sslutil: propagate return value ssl.PROTOCOL_SSLv23 from protocolsettings() Also, protocolsettings() was renamed to commonssloptions() to reflect that only the options are returned.

sslutil: stop storing protocol and options for SSLContext in settings dict Call protocolsettings() where its return values are needed.

sslutil: rename 'minimumprotocolui' -> 'minimumprotocol' Before, both 'minimumprotocolui' and 'minimumprotocol' were used, but meaning the same.

sslutil: properly detect which TLS versions are supported by the ssl module For the record, I contacted the CPython developers to remark that unconditionally defining ssl.PROTOCOL_TLSv1_1 / ssl.PROTOCOL_TLSv1_2 is problematic: https://github.com/python/cpython/commit/6e8cda91d92da72800d891b2fc2073ecbc134d98#r39569316

sslutil: remove dead code (that failed if only TLS 1.0 is available) We ensure in setup.py that TLS 1.1 or TLS 1.2 is present.

config: remove unused hostsecurity.disabletls10warning config

sslutil: remove dead code (that downgraded default minimum TLS version) We ensure in setup.py that TLS 1.1 or TLS 1.2 is present.