Ban handling improvements - most checking done before DB opened (much faster if user is banned).

Fix some bugs in ban admin pages.
Separate handler for IP- and ban-related functions (moves them out of e107_class)

e107_core/xml/default_install.xml

@@ -17,6 +17,7 @@
 		<core name="auth_method"></core>
 		<core name="autoban">1</core>
 		<core name="autologinpostsignup">1</core>
+		<core name="ban_date_format">%H:%M %d-%m-%y</core>
 		<core name="ban_max_online_access">100,200</core>
 		<core name="ban_retrigger">0</core>
 		<core name="cachestatus"></core>