comms/direwolf: Update 1.7 => 1.8

Changelogs:

• https://github.com/wb2osz/direwolf/releases/tag/1.8
• https://github.com/wb2osz/direwolf/compare/1.7...1.8

• Make DOCS option really work
• Pet portclippy(1) and portfmt(1)

Approved by: hamradio@ (alven@, yuri@)
Approved by: yuri@ (Mentor)
Differential Revision: https://reviews.freebsd.org/D53511