daemon/udp_queue: drop the error logging

Vladimír Čunátrequested to merge
sendmmsg-logs into master

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

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