server/mpm_unix.c (dummy_connection): Use a TLS 1.0 close_notify

alert if the chosen listener is configured for https; not perfect
but better than sending an HTTP request.  Adjust comments.

Backport of r1327036 and r1327080 from turnk,
resp. r1356884 from 2.4.x.

Submitted by: jorton
Reviewed by: covener, wrowe
Backported by: rjung


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1445100 13f79535-47bb-0310-9956-ffa450edef68