Tracker issue for intended features to support.

[joemphilips]

My plan is to support following feature in BOLT 9 in a first iteration.

• option_data_loss_protect ... Always have data-loss protection #19
• initial_routing_sync...
• option_upfront_shutdown_script
• gossip_queries ... TODO: finish routing #63
• var_onion_optin ... TODO: use tlv_payloadto encode onion packet #61
• option_static_remotekey
• payment_secret