How I did multiplayer: programming

Multiplayer FAQHaving had a fairly lengthy conversation about the multiplayer approach in Airships, I decided to compile a FAQ answering some of the common questions that cropped up.
AddendumI had short scare earlier on where I encountered desynchronization during a multiplayer game, until I determined it was simply because I'd left in some code from the non-multiplayer version of combat, and targeting commands were being executed locally rather than sent across the network.