This makes 'toolbox enter' similar to 'toolbox run $SHELL'.
The 'run' command is meant to spawn arbitrary binaries present inside
the toolbox container. Therefore it doesn't make sense for it to fall
back to /bin/bash, like it does for 'enter' if $SHELL is absent.
It's expected that users might use 'run' to create ad-hoc *.desktop
files. That's why it neither offers to create nor falls back to an
existing container like 'enter' does, because such interactions can't
happen when used in a *.desktop file. It's also a more advanced command
that new users are less likely to be interested in. Hence, this
shouldn't affect usability.
Some changes by Debarshi Ray.
https://github.com/debarshiray/toolbox/pull/76
The manuals shouldn't be installed in the top-level directory, but in
one of the sub-directories corresponding to the relevant section.
Fallout from 0a972dfccc
