authz_policy: Fixed handling of empty resources (`resource`, realm or id `None`).
authz_policy: Fixed handling of empty resources (`resource`, realm or id `None`).

Closes #8445.


git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@9345 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,jun66j5/trac-ja,jun66j5/trac-ja,netjunki/trac-Pygit2,jun66j5/trac-ja,netjunki/trac-Pygit2,walty8/trac,walty8/trac,walty8/trac,jun66j5/trac-ja,netjunki/trac-Pygit2