add configure checks for ssl functions:

-SSL_set_state: macro in OpenSSL, might be a function in a patched sslc
-SSL_set_cert_store: patch submitted to OpenSSL, might be applied to
OpenSSL or sslc


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94223 13f79535-47bb-0310-9956-ffa450edef68