Add SSL_CTX_dup #79

Job	Run time
address_ub_sanitizer	9m 56s
basic_clang	1m 9s
basic_gcc	1m 2s
check_docs	1m 0s
check_update	1m 26s
check-ansi	58s
fuzz_tests	2m 51s
minimal	44s
no-deprecated	1m 1s
non-caching	14m 31s
no-shared-macos	3m 46s
no-shared-ubuntu	1m 4s
self-hosted (freebsd-13.2)	1s
self-hosted (ubuntu-arm64-22.04)	1s
enable_non-default_options	1m 1s
external-test-cf-quiche	1m 41s
external-test-pyca (1.51.0, 3.9)	1m 16s
external-tests	1m 44s
full_featured	1m 18s
legacy	1m 3s
memory_sanitizer	18m 21s
no-legacy	1m 5s
out-of-readonly-source-and-install-macos	2m 24s
out-of-readonly-source-and-install-ubuntu	1m 6s
threads_sanitizer	1m 15s
	1h 11m 44s

Provide feedback