[why]
The config files are called `config.json` while the contents is
INI-like. The usual extension would be `.cfg`.
[how]
We use `.cfg` already for the shell variable configuration.
Combine both config file variants into one (real) cfg file, that is
directly read by the font-patcher and no shell variables files are used
anymore.
This needs some rewrite in gotta-patch-em to get the quoting right.
To make this simpler we remove the `--debug 1` option from the variable
and insert it directly (as it is applied always anyhow).
Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
