man: Clarify docs around --security type=static

Author: crobinso

man/en/virt-install.pod.in

@@ -176,8 +176,11 @@ in the guests XML configuration for access by other applications.
 
 Configure domain security driver settings. Type can be either 'static' or
 'dynamic'. 'static' configuration requires a security LABEL. Specifying
-LABEL without TYPE implies static configuration. To have libvirt automatically
-apply your static label, you must specify relabel=yes.
+LABEL without TYPE implies static configuration.
+
+To have libvirt automatically apply your static label, you must specify
+relabel=yes. Otherwise disk images must be manually labeled by the admin,
+including images that virt-install is asked to create.
 
 =back