banip: release 1.8.1-1

banip: release 1.8.1-1

* the debug mode now captures internal error output in a dedicated log file,
  located by default in the banIP base directory as /tmp/ban_error.log
* replaced the non-functional recursive PID tree walk in f_rmpid with
  a correct iterative implementation
* added several IP validator improvements
* fixed a copy-paste error in f_report
* fixed a uninitialized variable in f_actual
* fixed missing token validation in banip.cgi
* various other minor improvement & fixes
* removed abandoned nixspam feed
* LuCI: various fixes & optimizations
* readme update

Signed-off-by: Dirk Brenken <redacted>