schema: use a better regex for listen addresses

A domain with '::' as the listen address fails to validate.

Reuse the 'ipAddr' and 'dnsName' regexes from basictypes instead
of reinventing them.

https://bugzilla.redhat.com/show_bug.cgi?id=1285665

docs/schemas/domaincommon.rng

@@ -5221,9 +5221,10 @@
     </data>
   </define>
   <define name="addrIPorName">
-    <data type="string">
+    <choice>
-      <param name="pattern">(([0-2]?[0-9]?[0-9]\.){3}[0-2]?[0-9]?[0-9])|(([0-9a-fA-F]+|:)+[0-9a-fA-F]+)|([a-zA-Z0-9_\.\+\-]*)</param>
+      <ref name="ipAddr"/>
-    </data>
+      <ref name="dnsName"/>
+    </choice>
   </define>
   <define name="usbIdDefault">
     <data type="string">

tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-policy.args

@@ -19,5 +19,5 @@ QEMU_AUDIO_DRV=none \
 -net none \
 -serial none \
 -parallel none \
--vnc 127.0.0.1:59630,share=allow-exclusive \
+-vnc '[::]:59630,share=allow-exclusive' \
 -vga cirrus

tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-policy.xml

@@ -25,8 +25,8 @@
     <controller type='pci' index='0' model='pci-root'/>
     <input type='mouse' bus='ps2'/>
     <input type='keyboard' bus='ps2'/>
-    <graphics type='vnc' port='65530' autoport='no' listen='127.0.0.1' sharePolicy='allow-exclusive'>
+    <graphics type='vnc' port='65530' autoport='no' listen='::' sharePolicy='allow-exclusive'>
-      <listen type='address' address='127.0.0.1'/>
+      <listen type='address' address='::'/>
     </graphics>
     <video>
       <model type='cirrus' vram='16384' heads='1'/>