fix: usr: Fix a zone refresh bug

A secondary zone could fail to further refresh with new
versions of the zone from a primary server if named was
reconfigured during the SOA request step of an ongoing
zone transfer. This has been fixed.

Closes #5307

Merge branch '5307-zone-refresh-stuck-after-reconfiguration-fix' into 'main'

See merge request isc-projects/bind9!10468