I'm proposing a new markup language: FHML, F5g Hipster Markup Language. It's a superset of JSON, YAML & INI. It will use the "FHML" tag to determine how to interpret any given subsection.
The justification for this is none of the other markup/config formats are cool enough and/or weren't invented here. All FHML interpreters should be written in Haskell, Rust, Go or similar to indicate you're cooler than other developers.