add CHANGES and release notes documentation

(cherry picked from commit f924c89f)
14 jobs for 511-add-ms-selfsub-and-krb5-selfsub-v9_11 in 7 minutes and 43 seconds (queued for 10 seconds)
Status Job ID Name Coverage
  Precheck
passed precheck:debian:sid:amd64 #55998
amd64 docker linux

00:00:17

 
  Build
passed build:centos:centos6:amd64 #55999
amd64 docker linux

00:02:09

passed build:centos:centos7:amd64 #56000
amd64 docker linux

00:02:19

passed build:debian:sid:amd64 #56001
amd64 docker linux

00:02:39

passed build:debian:sid:i386 #56002
i386 docker linux

00:02:54

 
  Test
passed install:debian:sid:amd64 #56011
amd64 docker linux

00:01:54

passed systemtest:centos:centos6:amd64 #56007
amd64 docker linux

00:04:03

passed systemtest:centos:centos7:amd64 #56008
amd64 docker linux

00:04:11

passed systemtest:debian:sid:amd64 #56009
amd64 docker linux

00:04:29

passed systemtest:debian:sid:i386 #56010
i386 docker linux

00:04:18

passed unittest:centos:centos6:amd64 #56003
amd64 docker linux

00:01:12

passed unittest:centos:centos7:amd64 #56004
amd64 docker linux

00:01:17

passed unittest:debian:sid:amd64 #56005
amd64 docker linux

00:01:09

passed unittest:debian:sid:i386 #56006
i386 docker linux

00:00:49