As a generic, but important remark: whenever you make a pull request, first do a rebase and a fast-forward of the origin in your branch, otherwise older commits and unrelated show up in the pull requests. Like you see above commits related to cplc or pua_dialoginfo module.
Regarding the jwt commit, thanks for contributing, however I pushed a different approach to allow setting any numeric claims (grants). The jwt specs list other reserved names like not-before (nbf) with numeric values and actually there can be any other name with numeric values.
The `exp` can be added like:
``` $var(exp) = $Ts + 600; jwt_generate("/path/to/prvkey.pem", "RS256", "exp=$var(exp);caller='$fU';callee='$tU';callid='$ci'"); ```
The README has more details about parameters format.