Provide a way to influence the namespace mappings #120
Description
IIRC I have only run into two significant limitations with this tool so far, one has been #119 , the other is the hardcoded uid_map and gid_map mappings. This is a problem when trying to do things similar to running nested containers. (i.e. nix-user-chroot runs in a namespace, running further nested namespaces is better if id maps can be set up.)
It's a pretty simple tool but recompiling is more painful than not.
I may just try to make my scripted version of this publishable now that I have the vaguest idea of how it works.