Improve documentation of iso-scan/filename feature

From the current man page it's really hard to tell what will be output of this
command.

diff --git a/dracut.cmdline.7.asc b/dracut.cmdline.7.asc
index 3524adfd92a3f8cbf69b0f0b4facf14fc2e72129..dc140d7f2af7969f1eab410d89c295b1bd268898 100644 (file)
--- a/dracut.cmdline.7.asc
+++ b/dracut.cmdline.7.asc
@@ -113,6 +113,9 @@ resume=UUID=3f5ad593-4546-4a94-a374-bcfb68aa11f7
 iso-scan/filename
 ~~~~~~~~~~~~~~~~~
 
+Mount all mountable devices and search for ISO pointed by the argument. When
+the ISO is found set it up as a loop device. Device containing this ISO
+image will stay mounted at /run/initramfs/isoscandev.
 Using iso-scan/filename with a Fedora/Red Hat/CentOS Live iso should just work
 by copying the original kernel cmdline parameters.