add missing DBC checks for catz and add isc_magic checks; add DBC checks to ht.c

(cherry picked from commit a487473f)
21 jobs for 748-dns_catz_-are-missing-lots-of-dbc-checks-v9_12 in 13 minutes and 16 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Precheck
passed precheck:debian:sid:amd64 #111990
amd64 docker linux

00:00:19

 
  Build
passed build:asan:debian:sid:amd64 #111994
amd64 docker linux

00:04:06

passed build:centos:centos6:amd64 #111991
amd64 docker linux

00:02:11

passed build:centos:centos7:amd64 #111992
amd64 docker linux

00:02:04

passed build:debian:sid:amd64 #111993
amd64 docker linux

00:02:22

passed build:debian:sid:i386 #111995
i386 docker linux

00:02:31

passed noassert:build:debian:sid:amd64 #111996
amd64 docker linux

00:02:49

 
  Test
passed docs:debian:sid:amd64 #111997
amd64 docker linux

00:00:47

passed install:debian:sid:amd64 #112008
amd64 docker linux

00:02:19

passed noassert:systemtest:debian:sid:amd64 #112010
amd64 docker linux

00:08:32

passed noassert:unittest:debian:sid:amd64 #112009
amd64 docker linux

00:00:50

passed systemtest:asan:debian:sid:amd64 #112006
amd64 docker linux

00:08:48

passed systemtest:centos:centos6:amd64 #112003
amd64 docker linux

00:08:25

passed systemtest:centos:centos7:amd64 #112004
amd64 docker linux

00:08:30

passed systemtest:debian:sid:amd64 #112005
amd64 docker linux

00:08:29

passed systemtest:debian:sid:i386 #112007
i386 docker linux

00:08:41

passed unittest:asan:debian:sid:amd64 #112001
amd64 docker linux

00:01:18

passed unittest:centos:centos6:amd64 #111998
amd64 docker linux

00:00:47

passed unittest:centos:centos7:amd64 #111999
amd64 docker linux

00:00:53

passed unittest:debian:sid:amd64 #112000
amd64 docker linux

00:00:59

passed unittest:debian:sid:i386 #112002
i386 docker linux

00:00:51