Add `set_cert_verify_callback` (`SSL_CTX_set_cert_verify`) #940

Job	Run time
Cross build from macOS to Linux (FIPS) (x86_64-unknown-linux-gnu)	4m 0s
clippy	3m 12s
Cross build from macOS to Linux (x86_64-unknown-linux-gnu)	2m 46s
rustfmt	11s
Test features	7m 21s
Test FIPS integration	3m 10s
Test (stable)	2m 5s
Test (arm-android)	2m 4s
Test (arm64-android)	2m 2s
Test (i686-android)	2m 5s
Test (x86_64-android)	2m 0s
Test (aarch64-ios)	2m 31s
Test (aarch64-ios-sim)	2m 20s
Test (x86_64-ios)	2m 19s
Test (i686-linux)	2m 23s
Test (arm-linux)	2m 26s
Test (aarch64-linux)	2m 35s
Test (arm64-macos)	2m 13s
Test (x86_64-macos)	2m 25s
Test (x86_64-mingw)	4m 58s
Test (i686-msvc)	6m 31s
Test (x86_64-msvc)	5m 41s
	1h 7m 18s

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