Fixing locking in filtmgr_check_keys to use write lock instead of read

Ensure we only use unsigned char in the ART tree

Support the bind address

Fix integer division issue for ticks

Reduce tick interval from 1 second to 250 milliseconds

Increase sleep interval

Fixing multiple issues with art tree and long prefixes

Updating changelog

Tag the git sha

Updating changelog, cutting version 0.5.1