* include/functions.php: added function "check_refererer" for check
refererers in some places.
* extensions/extension_uploader.php, extensions/dbmanager.php,
operation/incidents/incident.php, operation/incidents/incident_detail.php,
godmode/servers/recon_script.php, godmode/users/configure_user.php,
godmode/tag/edit_tag.php: securized this files to XSS and CSRF attacks.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@5107 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f