Merge revisions 906039, 906057, 906485, 906491, 908015, 916733, 916817

from trunk resp. 917044 from 2.2.x:

New releases of OpenSSL will only allow secure renegotiation by
default.  Add an "SSLInsecureRenegotiation" directive to enable
renegotiation against unpatched clients, to ease transition.

Submitted by: jorton
Backport by: rjung
Reviewed by: pgollucci, wrowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@1002233 13f79535-47bb-0310-9956-ffa450edef68