Update documentation for CPU quota/period support for LXC

Following commit added suport the CPU quota/period to the LXC driver.
Update the documentation to reflect that.

	commit d9724a81
	Author: Daniel P. Berrange <berrange@redhat.com>
	Date:   Thu Nov 10 12:16:26 2011 +0000

	Add support for CPU quota/period to LXC driver
Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>

docs/formatdomain.html.in

@@ -426,8 +426,9 @@
         interval(unit: microseconds). Within <code>period</code>, each vcpu of
         the domain will not be allowed to consume more than <code>quota</code>
         worth of runtime. The value should be in range [1000, 1000000]. A period
-        with value 0 means no value. (NB: Only qemu driver support)
-        <span class="since">Since 0.9.4</span>
+        with value 0 means no value.
+        <span class="since">Only QEMU driver support since 0.9.4, LXC since
+        0.9.10</span>
       </dd>
       <dt><code>quota</code></dt>
       <dd>
@@ -437,8 +438,9 @@
         means that it is not bandwidth controlled. The value should be in range
         [1000, 18446744073709551] or less than 0. A quota with value 0 means no
         value. You can use this feature to ensure that all vcpus run at the same
-        speed. (NB: Only qemu driver support)
-        <span class="since">Since 0.9.4</span>
+        speed.
+        <span class="since">Only QEMU driver support since 0.9.4, LXC since
+        0.9.10</span>
       </dd>
     </dl>