revising implementation

* adjusting filter rule scripts for adding rejecting OUTPUT rules so responses to attacking IPs will properly cause error on server
* adjusting filter rule scripts for blocking all traffic from/to attacking IPs for massively reducing load on TCP sockets obviously required for blocking requests
* adding support for processing a captured request's URL in addition to its remote IP address
* introducing weighted counting for improving support for keeping site manageable using some CMS (sometimes causing a lot of requests itself)
* revising configuration by adding comments on all currently supported options
* adding warnings to show on trying to use currently untested receivers `syslog` and `unix`