stop mainloop when it errors - fix pingpong

fix SLP

Merge remote-tracking branch 'origin/master'

# Conflicts:
#	Cargo.lock
#	client/src/lib.rs
#	server/src/client_handler.rs
#	server/src/handler.rs
#	server/src/main.rs

SLP

exponential backoff to connections (wait at most 6m25s to connect to server)

hell is over!

hell is over?

hell pt3

hell pt2

hell

initial commit