[cleanup] Report "permission denied" instead of "unexpected error"
when trying to update a zone file is on a read-only file
system. Thanks to Midnight Veil. [GL #4134]
(cherry picked from commit
82401f0f0e5a5cc81e545ffe85415d29a16e15e3)
+6196. [cleanup] Report "permission denied" instead of "unexpected error"
+ when trying to update a zone file on a read-only file
+ system. Thanks to Midnight Veil. [GL #4134]
+
6193. [bug] Fix a catz db update notification callback registration
logic error, which could crash named when receiving an
AXFR update for a catalog zone while the previous update