* modules/ssl/mod_ssl.h: Add ssl_ext_lookup optional hook declaration.

* modules/ssl/ssl_engine_vars.c (ssl_ext_lookup): New function.
(ssl_var_register): Register optional function.

* modules/ssl/ssl_private.h (ssl_ext_lookup): Add prototype.

Submitted by: David Reid, Joe Orton


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@153933 13f79535-47bb-0310-9956-ffa450edef68