2da9fbbf15
On LSP side we were only checking if ACCEPT_ZEROCONF_CHANNELS is enabled while forwarding a non-trampoline htlc. During trampoline forwarding the config was ignored. The ACCEPT_* prefix implied this was only for accepting inbound zeroconf channels, but it also controls whether we open them when forwarding HTLCs. Renames the config var to OPEN_ZEROCONF_CHANNELS to clarify it enables zeroconf channel opens in both directions, and add the missing check when forwarding trampoline HTLCs.