Update to 1.72:

1.72 2015-09-22
    Fixed a problem where SvPVx_nolen was undefined in some versions of
    perl. Reported by Karen Etheridge. Replaced with SvPV_nolen.
    Fixed a cast warning on Darwin reported by Karen Etheridge.

1.71 2015-09-18
    Patch from Ben Kaduk: Conditionalise support for MD4, MD5.
    Added support for linking libraries in /usr/local/lib64 for some flavours
    of Linux like RH Tikanga.
    Fixes to X509_check_host, X509_check_ip, SSL_CTX_set_alpn_protos, and
    SSL_set_alpn_protos so they will compile on MSVC and AIX cc. Thanks to
    AGRUNDMA.
    Fixed typos in documentation for X509_NAME_new and X509_NAME_hash
    incorrect version 1.45 instead of 1.55 given.
    Version number in META.yml is now quoted per request from Satoshi Yagi.

(wiz)