Replace ZFS on Linux references with OpenZFS

This change updates the documentation to refer to the project
as OpenZFS instead ZFS on Linux.  Web links have been updated
to refer to https://github.com/openzfs/zfs.  The extraneous
zfsonlinux.org web links in the ZED and SPL sources have been
dropped.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #11007

scripts/zimport.sh

@@ -39,7 +39,7 @@
 #      -s "zfs-0.6.2 master installed" \
 #      -p "zevo-1.1.1 zol-0.6.2 zol-0.6.2-173 master installed"
 #
-# --------------------- ZFS on Linux Source Versions --------------
+# ------------------------ OpenZFS Source Versions ----------------
 #                 zfs-0.6.2       master          0.6.2-175_g36eb554
 # -----------------------------------------------------------------
 # Clone ZFS       Local		Local		Skip
@@ -68,9 +68,9 @@ TEST_DIR=$(mktemp -u -d -p /var/tmp zimport.XXXXXXXX)
 KEEP="no"
 VERBOSE="no"
 COLOR="yes"
-REPO="https://github.com/zfsonlinux"
+REPO="https://github.com/openzfs"
 IMAGES_DIR="$SCRIPTDIR/zfs-images/"
-IMAGES_TAR="https://github.com/zfsonlinux/zfs-images/tarball/master"
+IMAGES_TAR="https://github.com/openzfs/zfs-images/tarball/master"
 ERROR=0
 
 CONFIG_LOG="configure.log"
@@ -365,7 +365,7 @@ if [ ! -d "$SRC_DIR" ]; then
 fi
 
 # Print a header for all tags which are being tested.
-echo "--------------------- ZFS on Linux Source Versions --------------"
+echo "------------------------ OpenZFS Source Versions ----------------"
 printf "%-16s" " "
 for TAG in $SRC_TAGS; do
 	src_set_vars "$TAG"