3.3-rc1 doc update
improve attribution
fix branch snapshot build detection in build-scripts/make-jenkins-versions
Merge pull request #833 from zeha/f/fix-snapshot-build-version

fix branch snapshot build detection in build-scripts/make-jenkins-version
Merge pull request #832 from mind04/superfluous

make superfluous 'bind' NSEC3 record optional
Merge branch 'master' into rel/auth-3.3