Rework the code to handle apache -k shutdown|restart. The fundamental problem

Rework the code to handle apache -k shutdown|restart. The fundamental problem
being solved here is determining the best way to discover the Apache
parent process PID (stored in the location specified by the PidFile directive).
This patch attempts to read the config file directly to determine the
pidfile and avoids going through the motions of calling all the module initialization
routines.

This patch will not work if the pidfile directive is in a file pointed to by
an include directive. Not sure is this is a common case or not on Windows.
If it is, it is easy enough to add a bit more code to follow include
directives. An interesting modification would be to detect the presence of a \
-C directive containing a pointer to the pidfile: E.g.,
apache -k restart -C "pidfile d:/mypidfile". Let's keep it simple for now and
see what happens.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84620 13f79535-47bb-0310-9956-ffa450edef68