qnx6: credit contributor and mark filesystem orphan

Replace the content of the qnx6 README file with the canonical places for
such information.

Add the credits of the qnx6 contribution to CREDITS, and add an section in
MAINTAINERS to mark this filesystem as Orphan, as the domain ontika.net and
email address does not resolve to an IP address anymore.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20230220170210.15677-2-lukas.bulwahn@gmail.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>

CREDITS

@@ -229,6 +229,10 @@ S: University of Notre Dame
 S: Notre Dame, Indiana
 S: USA
 
+N: Kai Bankett
+E: chaosman@ontika.net
+D: QNX6 filesystem
+
 N: Greg Banks
 E: gnb@alphalink.com.au
 D: IDT77105 ATM network driver

MAINTAINERS

@@ -17163,6 +17163,12 @@ F:	fs/qnx4/
 F:	include/uapi/linux/qnx4_fs.h
 F:	include/uapi/linux/qnxtypes.h
 
+QNX6 FILESYSTEM
+S:	Orphan
+F:	Documentation/filesystems/qnx6.rst
+F:	fs/qnx6/
+F:	include/linux/qnx6_fs.h
+
 QORIQ DPAA2 FSL-MC BUS DRIVER
 M:	Stuart Yoder <stuyoder@gmail.com>
 M:	Laurentiu Tudor <laurentiu.tudor@nxp.com>

fs/qnx6/README

-
-  This is a snapshot of the QNX6 filesystem for Linux.
-  Please send diffs and remarks to <chaosman@ontika.net> .
-
-Credits :
-
-Al Viro		<viro@ZenIV.linux.org.uk> (endless patience with me & support ;))
-Kai Bankett	<chaosman@ontika.net> (Maintainer)