docs: formatdomain: add info about global_period and global_quota for cputune

Commit 4d92d5 and 55ecda introduced the parameters but didn't update the docs.
Signed-off-by: NKaterina Koukiou <kkoukiou@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

docs/formatdomain.html.in

@@ -747,6 +747,8 @@
     <shares>2048</shares>
     <period>1000000</period>
     <quota>-1</quota>
+    <global_period>1000000</global_period>
+    <global_quota>-1</global_quota>
     <emulator_period>1000000</emulator_period>
     <emulator_quota>-1</emulator_quota>
     <iothread_period>1000000</iothread_period>
@@ -837,6 +839,26 @@
         <span class="since">Only QEMU driver support since 0.9.4, LXC since
         0.9.10</span>
       </dd>
+      <dt><code>global_period</code></dt>
+      <dd>
+        The optional <code>global_period</code> element specifies the
+        enforcement CFS scheduler interval (unit: microseconds) for the whole
+        domain in contrast with <code>period</code> which enforces the interval
+        per vCPU. The value should be in range 1000, 1000000]. A
+        <code>global_period</code> with value 0 means no value.
+        <span class="since">Only QEMU driver support since 1.3.3</span>
+      </dd>
+      <dt><code>global_quota</code></dt>
+      <dd>
+        The optional <code>global_quota</code> element specifies the maximum
+        allowed bandwidth (unit: microseconds) within a period for the whole
+        domain. A domain with <code>global_quota</code> as any negative
+        value indicates that the domain has infinite bandwidth, which means that
+        it is not bandwidth controlled. The value should be in range
+        [1000, 18446744073709551] or less than 0. A <code>global_quota</code>
+        with value 0 means no value.
+        <span class="since">Only QEMU driver support since 1.3.3</span>
+      </dd>
 
       <dt><code>emulator_period</code></dt>
       <dd>