[ruby 2.4] OpenSSL 1.1 updates

[headius]

A number of method were added to accommodate changes in OpenSSL that made some structures like PKey opaque. See https://bugs.ruby-lang.org/issues/12324.

These methods are required to run some MRI tests, specifically test_https.rb now needs the PKey#set_key method to even boot.

UPDATE

... pieces missing for full Ruby 2.4/OpenSSL 1.1 compatibility :

• stricter hostname verification
• SSLContext#verify_hostname
• initialize_copy for PKey classes

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[headius]

Ref jruby/jruby#4293

[kares]

have included a compatibility layer in 0.9.19 ... its not complete but most stuff is in - tests should now boot.

[wallyqs]

did SSLContext#verify_hostname make it to a version of JRuby?