net/ts-warp: Add new port

Add net/ts-warp port, Transparent proxy server and traffic wrapper.
WWW: https://github.com/mezantrop/ts-warp

Committing slightly modified version (reworked Makefile a bit,
corrected pkg-plist and rc.d script).

Also connect to the category's Makefile.

PR: 269460
Differential Revision: https://reviews.freebsd.org/D42665