Added nftables support

*. Added default compile options CFLAGS=-DBSD for BSD and MacOS
*. Added nftables

6.1

Update README.md

Added pf firewall

1. Support BSD pf firewall
2. Command rename
   Some languages do not support the '.' character, so switch to the '_' character.
   Such as "drop.insert" changed to "drop_insert" ......

Added ipset support

Added ipset support

Added PID lock file and startup script

Added PID lock file and startup script

Added dynamic delete of iptables rules

Added dynamic delete of iptables rules,need to work with the ttl_iptables daemon

2.0

This version of the grammar has changed

1.4

Zombie repair process