Add some more modules that use mod_watchdog

r1839250 in trunk

+ remove some trailing spaces to synch with trunk
+ add the optional [s] in WatchdogInterval syntax

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1839254 13f79535-47bb-0310-9956-ffa450edef68