[libvirt] [PATCH] Document the effect of empty string as a rom file

[Ján Tomko]

This can be used to disable the ROM.
---
 docs/formatdomain.html.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 6276a61..050476f 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -4265,7 +4265,8 @@ qemu-kvm -net nic,model=? /dev/null
       The optional <code>file</code> attribute is used to point to a
       binary file to be presented to the guest as the device's ROM
       BIOS. This can be useful to provide an alternative boot ROM for a
-      network device.
+      network device. If the file attribute is present, but empty,
+      no ROM file will be loaded.
       <span class="since">Since 0.9.10 (QEMU and KVM only)</span>.
     </p>
     <h5><a name="elementDomain">Setting up a network backend in a driver domain</a></h5>
-- 
2.0.5