[bug#49258] [PATCH v2] Revise wondershaper package

[Aljosha Papsch]

Hello, 

this new patch version takes care of the points raised by Maxime
(https://issues.guix.gnu.org/49254#2):

* add a comment describing why a fork is used 
* replace (which ...) with (string-append (assoc-ref inputs ...) ...). 
* copy config file to store and substitute store file as fallback config. 
* substitute "cat" with full name from coreutils package.

Please take another look at these patches.

Thanks