Merge remote-tracking branch 'origin/2.2' into 3.0

# Conflicts:
#	dev-requirements.txt
#	requirements.txt
#	setup.py

gns3server/configs/iou_l2_base_startup-config.txt

@@ -15,7 +15,7 @@ no ip icmp rate-limit unreachable
 !
 ! due to some bugs with IOU, try to change the following line to 'ip cef' if your routing does not work
 no ip cef
-no ip domain-lookup
+no ip domain lookup
 !
 !
 !

gns3server/configs/iou_l3_base_startup-config.txt

@@ -14,7 +14,7 @@ no ip icmp rate-limit unreachable
 !
 ! due to some bugs with IOU, try to change the following line to 'ip cef' if your routing does not work
 no ip cef
-no ip domain-lookup
+no ip domain lookup
 !
 !
 ip tcp synwait-time 5