Fixes to produce the Cygwin 1.x binaries out-of-the-box;

Fix perform_idle_server_maintenance() for Cygwin: use SIGKILL rather
than SIGUSR1 because the latter has no effect.

PR: PR#7837 and PR#7838
Submitted by:	Stipe Tolj <tolj@wapme-systems.de>
Reviewed by:	Martin Kraemer


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@89348 13f79535-47bb-0310-9956-ffa450edef68