Showstopper to patch adoption, along with a more general objection

     jailletc36: v2: update as per discussion on dev@. Do not mix ap_ and apr_

                 namespaces + tweak DOXYGEN comments.

     +1: jailletc36, icing

     -0: wrowe [Prefer that we pre-@deprecate this API and encourage users

                to adopt the apr_ convention, reversing the #defines, being

                ready for the httpd 2.next minor release.]

     -1: wrowe [Notes this patch creates binary incompatible versions of httpd

                with this change; there must be #else stubs in util.c sources

                compiled against APR 1.6+ for binary compatibility, even if

                these are simply;

                AP_DECLARE(int) ap_cstr_casecmpn(const char *s1,

                                                 const char *s2, apr_size_t n)

                {

                    return apr_cstr_casecmpn(s1, s2, n);

                }

               ]

  *) abs: Add OPENSSL_Applink in Visual Studio >= 2015 or abs fails with a no

     OPENSSL_Applink error. PR59630