Terminate CGI scripts when the client connection drops. This

fix only applies to some normal paths in mod_cgi.  mod_cgid
is still busted.

A prereq for this fix is the change to content-length filter to
notice c->aborted:

http://cvs.apache.org/viewcvs.cgi/httpd-2.0/server/protoc
ol.c.diff?r1=1.119&r2=1.120&diff_format=h

PR:         8388


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97364 13f79535-47bb-0310-9956-ffa450edef68