Set OPENSSL_NO_SSL_INTERN when compiling against OpenSSL 1.0.1

Set OPENSSL_NO_SSL_INTERN when compiling against OpenSSL 1.0.1
or later, so that mod_ssl retains binary compatibility with future
versions when internal structures are changed. Use API functions
where available, and fall back to direct access for OpenSSL up
to 1.0.0, where needed.

Remove SSL_make_ciphersuite() from ssl_util_ssl.[ch], as it was
never used by any released version of mod_ssl.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1222917 13f79535-47bb-0310-9956-ffa450edef68