added: IP ban mechanism (not finished yet -- we need a winix function to remove a ban)

now after some incorrent login attempts your IP can be banned or blocked
       (see new config variables)


git-svn-id: svn://ttmath.org/publicrep/winix/trunk@902 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/request.h

@@ -89,6 +89,10 @@ struct Request
 	const char * env_content_type;
 	const char * env_https;
 	
+	// current IP address of the remote host (read from REMOTE_ADDR environment variable)
+	// (at the moment only IPv4 are supported)
+	int ip;
+
 	// true if the browser is Microsoft Internet Explorer
 	bool browser_msie;