Merge branch 'kl/allow-working-in-dot-git-in-non-bare-repository'

Merge branch 'kl/allow-working-in-dot-git-in-non-bare-repository'

The "disable repository discovery of a bare repository" check,
triggered by setting safe.bareRepository configuration variable to
'explicit', has been loosened to exclude the ".git/" directory inside
a non-bare repository from the check.  So you can do "cd .git &&
git cmd" to run a Git command that works on a bare repository without
explicitly specifying $GIT_DIR now.

* kl/allow-working-in-dot-git-in-non-bare-repository:
  setup: allow cwd=.git w/ bareRepository=explicit