fix some PTR label/domain issues
add ctnrs to DNS view tests
add ctnrs to static interface tests
add containers to address record tests
add ctnrs to CNAME tests
add ctnrs to cybind tests
add ctnrs to domain tests
add ctnrs to mx tests
add ctnrs to nameserver tests
fix filtering by ctnr in nameserver tests
add ctnrs to ptr tests
add ctnrs to srv, sshfp, txt tests
add ctnrs to view and search tests