** You can "quote" a file name to inhibit special significance of
special syntax, by adding `/:' to the beginning. Thus, if you have a
directory named `/foo:', you can prevent it from being treated as a
reference to a remote host named `foo' by writing it as `/:/foo:'.
Emacs uses this new construct automatically when necessary, such as when you start it with a working directory whose name might otherwise be taken to be magic.