* ud-generate: move the regex that determines whether or not to include
a host in the dns-sshfp zone snippet (for SSHFP and A, AAAA and MX
records) to the config file.
* ud-generate: move the regex that determines whether or not to include
a host in the dns-sshfp zone snippet (for SSHFP and A, AAAA and MX
records) to the config file.