Improve startup time when pyOpenSSL is available on the environment

[isidentical]

Based on #1232

[github-actions]

Benchmarks

Benchmark	master	this_branch
http --offline pie.dev/get (startup)	234 ms	215 ms: 1.09x faster
Geometric mean	(ref)	1.01x slower

Some benchmarks were hidden from this list because their timings did not change in a significant way (change was within the error margin ±6%).

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Benchmark	master-complex	this_branch-complex
http --version (startup)	283 ms	252 ms: 1.13x faster
http --offline pie.dev/get (startup)	288 ms	257 ms: 1.12x faster
Geometric mean	(ref)	1.07x faster

Some benchmarks were hidden from this list because their timings did not change in a significant way (change was within the error margin ±6%).

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