I'm getting a surprising large number of questions about overlayfs sent
to me personally, rather than to a relevant mailing list.

So remove my email address from the documentation, and add a note
about looking in the MAINTAINERS file.
Signed-off-by: NNeilBrown <neilb@suse.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Reported-by: Fabian Sturm <fabian.sturm@aduu.de> 
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>

Reported-by: NSedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>

Allow "lowerdir=" option to contain multiple lower directories separated by
a colon (e.g. "lowerdir=/bin:/usr/bin").  Colon characters in filenames can
be escaped with a backslash.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>

Some distributions carry an "old" format of overlayfs while mainline has a
"new" format.

The distros will possibly want to keep the old overlayfs alongside the new
for compatibility reasons.

To make it possible to differentiate the two versions change the name of
the new one from "overlayfs" to "overlay".
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Reported-by: NSerge Hallyn <serge.hallyn@ubuntu.com>
Cc: Andy Whitcroft <apw@canonical.com>

Document the overlay filesystem.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>