permissions

If .git is not readable, but ../.git is, .git works with
the database in ../.git.  Is that the desired behavior?
It would seem more appropriate that git fail with a
"permission denied" error.  In particular, if .git
is not readable and there is no database between
$PWD and $GIT_CEILING_DIRECTORIES, the current error is:
fatal: Not a git repository (or any of the parent directories): .git

Wouldn't it be better to have the error message be something like:
.git: permission denied

After all, it is a git repository, so "Not a git repository"
is not accurate.

-- 
William Pursell