pacmd: Added --help and --version descriptions to the man page.

The pacmd man page should show the available options. A simple
description for the --version and --help option was added.

man/pacmd.1.xml.in

@@ -25,6 +25,8 @@ USA.
 
   <synopsis>
     <cmd>pacmd</cmd>
+    <cmd>pacmd <opt>--help</opt></cmd>
+    <cmd>pacmd <opt>--version</opt></cmd>
   </synopsis>
 
   <description>
@@ -41,6 +43,22 @@ USA.
     passed into the live shell which will process the command and exit.</p>
   </description>
 
+  <options>
+
+    <option>
+      <p><opt>-h | --help</opt></p>
+
+      <optdesc><p>Show help.</p></optdesc>
+    </option>
+
+    <option>
+      <p><opt>--version</opt></p>
+
+      <optdesc><p>Show version information.</p></optdesc>
+    </option>
+
+  </options>
+
   <section name="Authors">
     <p>The PulseAudio Developers &lt;@PACKAGE_BUGREPORT@&gt;; PulseAudio is available from <url href="@PACKAGE_URL@"/></p>
   </section>