Add CHANGES entry

4914.	[bug]		A bug in zone database reference counting could lead to
			a crash when multiple versions of a slave zone were
			transferred from a master in close succession.
			[GL #134]
7 jobs for 134-fix-zone-db-reference-counting in 6 minutes and 31 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Precheck
passed #4103
linux docker
precheck:debian:sid:amd64

00:00:11

 
  Build
passed #4104
linux docker
build:debian:sid:amd64

00:01:33

passed #4105
linux docker
build:debian:sid:i386

00:01:40

 
  Test
passed #4108
docker linux
systemtest:debian:sid:amd64

00:04:39

passed #4109
docker linux
systemtest:debian:sid:i386

00:04:38

passed #4106
docker linux
unittest:debian:sid:amd64

00:00:46

passed #4107
docker linux
unittest:debian:sid:i386

00:00:46