Socks 5 support #288

Job	Run time
lint	16s
test (ruby-3.1, ubuntu-latest)	20s
test (ruby-3.0, ubuntu-latest)	21s
test (ruby-3.3, ubuntu-latest)	27s
test (ruby-3.2, ubuntu-latest)	22s
test-flaky (jruby-9.4, ubuntu-latest)	26s
	2m 12s

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