Close the accepted socket before creating the CGI process in mod_cgid.

This is safe, because we have already dup'ed the socket for the CGI
process itself.  This change allows CGI processes to fork long-lived
child processes without affecting how quickly the response gets back
to the broswer.

PR:	7273
Submitted by:	Taketo Kabe <kabe@sra-tohoku.co.jp>
Reviewed by:	Ryan Bloom


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88264 13f79535-47bb-0310-9956-ffa450edef68