After you have run checksetup.pl twice, run testserver.pl http://yoursite.yourdomain/yoururl to confirm that your web server is configured properly for Bugzilla.
bash$
./testserver.pl http://landfill.bugzilla.org/bugzilla-tip
TEST-OK Webserver is running under group id in $webservergroup.
TEST-OK Got ant picture.
TEST-OK Webserver is executing CGIs.
TEST-OK Webserver is preventing fetch of http://landfill.bugzilla.org/bugzilla-tip/localconfig.