net/mtg: Update 2.1.13 => 2.2.6
Changelogs:
- https://github.com/9seconds/mtg/releases/tag/v2.2.6
- https://github.com/9seconds/mtg/releases/tag/v2.2.5
- https://github.com/9seconds/mtg/releases/tag/v2.2.4
- https://github.com/9seconds/mtg/releases/tag/v2.2.3
- https://github.com/9seconds/mtg/releases/tag/v2.2.2
- https://github.com/9seconds/mtg/releases/tag/v2.2.1
- https://github.com/9seconds/mtg/releases/tag/v2.2.0
PR: 294047
Reported by: Boris Korzun <drtr0jan@yandex.ru> (maintainer)
Approved by: maintainer, vvd (mentor)
Co-authored-by: Vladimir Druzenko <vvd@FreeBSD.org>