extconf.rb - add logging for OpenSSL versions

[MSP-Greg]

Description

This PR only changes logging when compiling with OpenSSL.

Currently, extconf.rb has comments about which functions exist in various OpenSSL versions. This PR changes the comments to ouput logging. Example below, all lines beginning with three dashes are new:

checking for pkg-config for openssl... [" ", "", "-lssl -lcrypto"]
──── Using OpenSSL pkgconfig (openssl.pc) ────
checking for openssl/bio.h... yes

──── Below are yes for 1.0.2 & later ────
checking for DTLS_method() in openssl/ssl.h... yes
checking for SSL_CTX_set_session_cache_mode(NULL, 0) in openssl/ssl.h... yes
checking for SSL_CTX_set_ecdh_auto(NULL, 0) in openssl/ssl.h... yes

──── Below are yes for 1.1.0 & later ────
checking for TLS_server_method() in openssl/ssl.h... yes
checking for SSL_CTX_set_min_proto_version(NULL, 0) in openssl/ssl.h... yes
checking for X509_STORE_up_ref()... yes

──── Below is yes for 1.1.0 and later, but isn't documented until 3.0.0 ────
checking for SSL_CTX_set_dh_auto(NULL, 0) in openssl/ssl.h... yes

──── Below is yes for 1.1.1 & later ────
checking for SSL_CTX_set_ciphersuites(NULL, "") in openssl/ssl.h... yes

──── Below is yes for 3.0.0 & later ────
checking for SSL_get1_peer_certificate() in openssl/ssl.h... yes

These comments appear in CI logs, and if one is installing the gem, the log fie is gem_make.out in the proper Ruby 'extensions' folder.

Your checklist for this pull request

• I have reviewed the guidelines for contributing to this repository.
• I have added (or updated) appropriate tests if this PR fixes a bug or adds a feature.
• My pull request is 100 lines added/removed or less so that it can be easily reviewed.
• If this PR doesn't need tests (docs change), I added [ci skip] to the title of the PR.
• If this closes any issues, I have added "Closes #issue" to the PR description or my commit messages.
• I have updated the documentation accordingly.
• All new and existing tests passed, including Rubocop.

[dentarg]

Should X509_STORE_up_ref be under 1.1.1? It moved here

https://www.openssl.org/docs/man1.1.0/man3/X509_STORE_up_ref.html is "Page Not Found" but https://www.openssl.org/docs/man1.1.1/man3/X509_STORE_up_ref.html exist

[MSP-Greg]

OpenSSL docs, especially older ones...

See https://github.com/openssl/openssl/blob/OpenSSL_1_1_0/crypto/x509/x509_lu.c#L220

[MSP-Greg]

I just updated the PR, added links for the two 'special items'...

[MSP-Greg]

@dentarg

I reviewed this again, and two of the have_func calls were no longer being used in mini_ssl.c, so the last commit removed them...