Ruby OpenSSL Hostname Verification

After reviewing RFC 6125 and RFC 5280, we found multiple violations of matching
hostnames and particularly wildcard certificates.
Ruby’s OpenSSL extension will now provide a string-based matching algorithm which
follows more strict behavior, as recommended by these RFCs. In particular,
matching of more than one wildcard per subject/SAN is no-longer allowed. As well,
comparison of these values is now case-insensitive.