Reveal what backend and target is used to jinja

[david-syk]

To make life easier when working with output from sigma it would be quite useful to have the name of the backend & target available when doing postprocessing in jinja2.

With this in place one could create a general template, that could be reused across multiple targets taking target or backend into account.

[thomaspatzke]

Good idea - I transfer it as enhancement request to pySigma as it will be implemented there.

[thomaspatzke]

Implemented