[NEW PORT] x11/dsbautostart: Manage commands to be executed at X session start

[ultima]

Summary

DSBAutostart is a Qt program that allows you to manage commands to be executed
at X session start.

WWW: http://freeshell.de/~mk/projects/dsbautostart.html

PR\: 221131
Submitted by\: Marcel Kaiser <[e-mail]> (maintainer)
Reviewed by\: lifanov (mentor), matthew (mentor)
Approved by\: lifanov (mentor), matthew (mentor)
Differential Revision\: https://reviews.freebsd.org/DXXXXX

Test Plan

portlint:
looks fine.

poudriere:
103i386
103amd64
110i386
110amd64
12i386
12amd64

[matthew]