Init script update and add systemd init script
Round robin available addresses instead of randomising to recover quicker and predictably
Do not perform host lookup on IP addresses
Implement "peer send queue" configuration for ZMQ, and default to 2 - this prevents all pending payloads eventually being stuck on a single failed peer and resulting in a network timeout (fixes #66)
Sorted lc-admin status output
Fix repeated partial acks causing excessive registrar event received notices
Fix #68 loop
Implement safer pending payload and partial ack handling