Reconnect delay should increase on subsequent failures

[Davnit]

Right now it's a static value that is either too long for the occasional "oops my connection went down" or too spammy for when you get IP banned or they are doing server maintenance.

[nmbook]

I think reconnect delay needs a bit of work in general: handling more cases (CD-Key ghosting), and there seems to be a couple bugs with it on my build and I don't know if that's my fault or not.

[nmbook]

Implemented.