net/spoofdpi: Update 1.4.1 => 1.5.1

Changelogs:

• https://github.com/xvzc/spoofdpi/releases/tag/v1.5.0
• https://github.com/xvzc/spoofdpi/releases/tag/v1.5.1

Reviewed by: osa, vvd (mentors)
Approved by: vvd (co-mentor)
Differential Revision: https://reviews.freebsd.org/D56829