* Replace Jekyll highlight tags with fenced code blocks
Replace Jekyll highlight tags with fenced code blocks.
Canonicalize javascript to js.
Correct highlighting languages.
Add highlighting to code blocks.
Remove leading $ from bash blocks.
Remove empty lines at start and end of code blocks.
Stripped trailing whitespace.
* Fix language of code highlighting
* Handle IPv4 "Classless in-addr.arpa delegation" RFC2317 (partial).
* Validate PTR name when in RFC2317 "Classless in-addr.arpa delegation" domains.
* Update docs
* Set CanUsePTR for Route53 and Google CloudDNS.
* BIND: Replace "/" with "_" in filenames.