bug#30830: Allow disabling of collision checks

[Ludovic Courtès]

Heya,

Ricardo Wurmus <rek...@elephly.net> skribis:

> “guix package” should have a new option “--allow-collisions”, which
> disables the pre-install collision checks.

Done in commit fc95dc4c34bf88ebd8c21752bf6d54b5cf752d1a.

Ludo’.