note about null-termination in enet_address_get_host
avoid an enet_time_get call when timeout expires
avoid some strncpy usage
added maximumPacketSize and maximumWaitingData fields for limiting peer buffer space
update license date
fix maximumWaitingData handling to allow acknowledgements when the packet already exists
Merge remote-tracking branch 'upstream/master'

Conflicts:
	include/enet/protocol.h