The dropships have no roofs

## Testmerges
#9405: '[EVENT] Pathogen Confluence' by realforest2001 at commit 1096fcebd9
#9582: 'Wey-Yu Intranet Version 1.3.8' by realforest2001 at commit 7b2dfbcafc
#9590: 'Multi Z Almayer [MDB IGNORE]' by spartanbobby at commit 48f08bf673
#9427: 'external authentication system' by hry-gh at commit 8ca7acda2f
#9717: 'pred gauntlet fix and cleanup' by Detective-Google at commit d3706c914e

## Round ID
28404

## Description of the bug
You can shoot down from the railings, killing everyone in the dropship.

## What's the difference with what should have happened?
The dropships should obviously have roofs, and should not be able to be fired on, from above, for obvious reasons.

## How do we reproduce this bug?
Be CLF.
Go to midship.
Shoot people on the normandy and alamo.
Laugh.

## Attached logs
```
"aaaaaaaaaaaaaagh oh god please where are they I don't wanna die this where are they even shooting us from we're in a dropship that obviously has a roof" - Ben Wyatt
```

## Additional details
- Author: AmazingDragons
- Admin: SmellyHippie
- Note: None