Add negregex constraint type for not allowing values based on a regex.

3 jobs for its9442 in 34 minutes and 30 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build-gnutls-mit-standalone-lloadd #3003

00:32:56

passed build-no-threads-no-slapd #3001

00:03:50

passed build-openssl-heimdal-lloadd #3002

00:34:29