net/libpfctl: support FreeBSD 12 and 13

[kp]

Summary

Extend the port to also build for FreeBSD 12.4 and FreeBSD 13.1.
While here also update the 14.0 hash to a more recent code snapshot.

Sponsored by: Rubicon Communications, LLC ("Netgate")

[kp]

• explicitly depend on libnv
• create libpfctl.so -> libpfctl.so.0 link

[garga]

net/libpfctl/Makefile

2

You should include bsd.port.pre.mk later, just below PLIST_FILES declaration

7–11

Since this block depends of bsd.port.pre.mk, you can move it after it's included

37

Replace direct use of ln by ${LN}

57

Since you already included bsd.port.pre.mk, here you should only include bsd.port.post.mk

[kp]

• review remarks