main: Sanitize resolving of listen address
main: Sanitize resolving of listen address

Nother special here, just get rid of on-shot local variable
and use the util::resolve to improve the verbosity of the
exception thrown on error.

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla