Moves misplaced var from airlock_control.dm

Moved explosion_resistance from airlock_control.dm to airlock.dm proper.
Doors now retry if they fail to complete commands
Merge pull request #5575 from mwerezak/airlock-control

Doors now remember their last command and retry if they fail
Fixes webbing and holsters shielding EMP
Changes Space Law book to Corporate Regulations

Because fuck anyone that thinks "Space Law" is a good name for a roleplaying server.
Detective Revolver nerf. Uses agony instead of...

stun and weaken. Also changed the shotgun's stunshot to be a very powerful agony based shotgun shell. Beanbags are not for combat, stunshots are.
Readjusted agony of weakbullet.
Fixes human internal organs list
Fixes germ levels going below zero
Merge pull request #5593 from mwerezak/internal-organ-processing

Fixes internal organ processing
Merge pull request #5585 from SparklySheep/patch-3

Fuk da law
Merge pull request #5581 from mwerezak/accessory-emp-fix

Fixes accessories attached to a jumpsuit not being affected by EMP
Changed URL to Corporate Regulations
Little Slip-up
space law -> Corporate regs in skills
Space law -> Corporate regs in captain.dm
Merge pull request #5603 from DJSnapshot/hotfix

Changing URL of Corporate Regulations to the new Corporate Regulations
Merge pull request #5587 from SparklySheep/patch-4

Detective Revolver nerf. Uses agony instead of...
Fixes #5563
Merge pull request #5613 from comma/master

Fixes #5563