net/py-urllib3: Update to 1.25.6
* Convert the RUN_DEPENDS into separate OPTIONS as they are listed as extra
dependencies in setup.py. Also set those as default that contain the
previous RUN_DEPENDS to allow a clean transition.
* Remove the Python-specific version limitation for security/py-certifi
because it's required for all Python versions.
* Also remove the info about the broken IPv6 support of net/py-socks (was
broken in 1.5.7) and the relevant patch as both are obsolete.
* Update the TEST_DEPENDS and add a "do-test" target to make future QA easier.
Please note that a MFH won't be done as it didn't get an approval because
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