https: do not automatically use invalid servername
Stop automatically setting servername in https.request() if the target host is specified with an IP address. Doing so is invalid, and triggers a deprecation warning. It is still possible to send an IP address as a servername if its required, but it needs to be explicity configured, it won't happen automatically.
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines