Fix a couple of bugs in mod_cgid:

Fix a couple of bugs in mod_cgid:

The cgi arguments were sometimes mangled because no terminating '\0' was
added to the arg string passed to the cgi daemon.

The len parm to accept() was not initialized, leading sometimes to an
endless loop of failed accept() calls on OS/390 and anywhere else that
failed the call if the len was negative.

Tweaks: Add some traces for failed socket calls at cgi daemon setup time
(most of which I hit while playing around).

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85452 13f79535-47bb-0310-9956-ffa450edef68