(PUP-11718) Update comment about old OpenSSL

This commit updates a comment referring to versions of OpenSSL that
Puppet no longer supports (OpenSSL < 1.1) and adds a comment about
JRruby support.

Author: mhashizume

lib/puppet/ssl/ssl_provider.rb

@@ -235,7 +235,7 @@ def print(ssl_context, alg = 'SHA256')
   def default_flags
     # checking the signature of the self-signed cert doesn't add any security,
     # but it's a sanity check to make sure the cert isn't corrupt. This option
-    # is only available in openssl 1.1+
+    # is not available in JRuby's OpenSSL library.
     if defined?(OpenSSL::X509::V_FLAG_CHECK_SS_SIGNATURE)
       OpenSSL::X509::V_FLAG_CHECK_SS_SIGNATURE
     else