Merge r517233 from trunk:

* server/mpm_common.c (dummy_connection): Use "OPTIONS *" for request
on dummy connection.

PR: 41796

Submitted by: jorton
Reviewed by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@583152 13f79535-47bb-0310-9956-ffa450edef68