games/assaultcube: Update to 1.3.0.2

Submitter becomes maintainer, already maintainer of several ports.

The PORT_ENET option no longer compiles, so remove it. The MASTER server option
is also currently broken, but players playing the game or running a dedicated
server should not need to run it, so disable this option for now.

While here, pet linters.

ChangeLog: https://assault.cubers.net/docs/history.html

• the server sends messages so you know what data was used for shuffeling (random < match < vita)
• switching to spectator only incurs respawn delay, not suicide/teamkill
• the overview spectator can now see the flags in tilted-model or radar-like ways through overviewflags setting
• connect protocol waits for authentication with the masterserver before connecting
• register connect protocol script for linux

PR: 269505
Reported by: kevinz5000@gmail.com (maintainer)