daemon/udp_queue: drop the error logging

We should do this for all transports and probably just in verbose mode. We were printing lots of these on Turris OS (for one user at least): https://forum.turris.cz/t/5-1-8-kresd-throwing-many-errors-in-var-log-messages/14775

EACCESS in particular apparently may happen (on Linux) when the network is "unavailable", EPERM because of firewall/netfilter: https://stackoverflow.com/a/23869102