[9.18] Handle address lookup failure more gracefully
requested to merge 3830-nsupdate-failed-to-handle-primary-server-address-lookup-gracefully-v9_18 into v9_18
Backport of MR !7444 (merged)
If the address lookup of the primary server fails just abort the current update request rather than calling exit. This allows nsupdate to cleanup gracefully.
(cherry picked from commit f1387514)
Closes #3830 (closed)
Edited by Mark Andrews