Give Rust Removal a shorter Doafter (#770) (#41518)

Give Rust Removal a shorter Doafter (#770) (#41518)

* Give Rust Removal a shorter Doafter (#770)

* Yeah, yeah, mircobalance. Every janitor player will fight you though. Welding and brushing walls free of rust now takes just three seconds.

* Now reinforced walls take a bit longer to de-rust. Times are as follows:

Solid wall: 1s weld, 3s brush
Reinforced wall: 2s weld, 3s brush

* Actually, just make both take 4s to brush and 1s to weld. Problem solved.

* changed the welding timer from 1 to 2 seconds for lag compensation.