Shuttles will always destroy things in their way

Fixes #1992

Also:
-Adds labour shuttle to admin secrets
-Removes delay when admins move shuttles
-Shuttles inflict heavy brute damage instead of instagibbing
-Behaviour extended to supply shuttle
Removed execution by shuttle docking
Merge pull request #3851 from Ikarrus/splat

Shuttles docking on you will really hurt