GHCi permission checks should ignore root user
As a security precaution, GHCi helpfully refuses to run a
.ghci file if it is owned by another user. But if the that other user is root, then arguably GHCi should not refuse to interpret the file, because if root really was malicious, then the user would be having a bad day anyways.
This means that .ghci files installed in a global location, say under
/usr/local/, can then be read.