Add new port net/radcli

radcli is a library for writing RADIUS clients. It aims to allow writing
a RADIUS-aware application in less than 50 lines of code. It is based on the
freeradius-client library, but legacy code has been removed; IPv6 support,
pkg-config, TLS/DTLS, and API documentation have been added. It remains
source compatible with radiusclient-ng and freeradius-client.

WWW: https://radcli.github.io/radcli/

PR: 219088
Submitted by: Jov <amutu@amutu.com>
Reviewed by: danfe