tor-keymgr: Add private RelKeyPath type for relative paths.
This makes rel_path return a RelKeyPath instead of a PathBuf to
prevent the accidental misuse of relative key paths (like the one
from #1492 (closed)).
Closes #1494 (closed)
This makes rel_path return a RelKeyPath instead of a PathBuf to
prevent the accidental misuse of relative key paths (like the one
from #1492 (closed)).
Closes #1494 (closed)