Add gsocket to the FreeBSD ports tree

[roachspray]

It would be nice to have gsocket available in the FreeBSD ports tree. This would involve a couple of things:

1. who would maintain the port?
2. we would need to have the port Makefile and metadata files created so that the port builds etc
3. we would need to contact ports folk to have it added

I have implemented (2) as a possible option, but I am not opposed to gutting it, if people wish. However, I wanted to offer up as an example. I have myself as the maintainer, but that was just a placeholder as depends on (1). They may be found: in github and are intended for /usr/ports/net/gsocket/

Some links to helpful documentation (also exposing some of the gaps in my example):

• See /usr/ports/Mk/ files as they will document a lot of the options available
• FreeBSD Handbook chapter on making a new port
• porters handbook chapter on making a port

[roachspray]

I will create a pull request for the packaging branch per off-online conversation.

[roachspray]

I have opened a FreeBSD PR for this to be added ... will ping here/close when it is.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250917

[roachspray]

Ok, per 250917 comment

`Author: lwhsu
Date: Sat Nov 7 08:06:19 UTC 2020
New revision: 554346
URL: https://svnweb.freebsd.org/changeset/ports/554346

Log:
Add net/gsocket`

If someone else wants to maintain, that is fine.