Axe out SSL_CONSERVATIVE stuff which for Apache 1.3 did I/O data

pre-sucking on POST requests and I/O re-injection in case of SSL
renegotiations. This all either cannot be solved any longer or at least
has to be implemented totally different through I/O layering/filtering.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89017 13f79535-47bb-0310-9956-ffa450edef68