Start writing down incompatibilities to mod_ssl 2.x from Apache 1.3.

Our general goal is to axe down mod_ssl to a minimum, because what we
don't have anymore we don't have to port and as simpler mod_ssl becomes.
Nevertheless we will try to minimize incompatibilities if possible.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89011 13f79535-47bb-0310-9956-ffa450edef68