Merge r1916863 from trunk:

Merge r1916863 from trunk:

* Ensure that we set the default DH parameters for the key

Replace else with an if as the if branch no longer ensures that
custome DH parameters have been loaded.
This fixes a regression that causes the default DH parameters for a key
no longer set and thus effectively disabling DH ciphers when no explicit
DH parameters are set.

PR: 68863
Submitted by: rpluem
Reviewed by: rpluem, jorton, ylavic

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1918385 13f79535-47bb-0310-9956-ffa450edef68