Added Dell ME4 multipath config

From: Ulrich Goettlich <Ulrich.Goettlich@vonaffenfels.de>

See https://downloads.dell.com/manuals/common/powervault-me4-series-linux-3924-bp-l_en-us.pdf

Signed-off-by: Ulrich Goettlich <Ulrich.Goettlich@vonaffenfels.de>
---
 multipath/multipath.conf |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/multipath/multipath.conf b/multipath/multipath.conf
index ab6cfe1..aaf45e5 100644
--- a/multipath/multipath.conf
+++ b/multipath/multipath.conf
@@ -40,6 +40,17 @@ devices {
 		prio			rdac
 		no_path_retry		30
 	}
+	device {
+		vendor			"DellEMC"
+		product			"ME4"
+		path_grouping_policy	"group_by_prio"
+		path_checker		"tur"
+		hardware_handler	"1 alua"
+		prio			"alua"
+		failback		immediate
+		rr_weight		"uniform"
+		path_selector		"service-time 0"
+	}
 	device {
 		vendor			"DGC"
 		product			".*"
