RNG: Allow multiple parameters to be passed to an interface filter

Our code supports that for ages. When using a <filterref/> to an
<interface/> several parameters can be passed to the filter. Later,
when building firewall rules, parameters are substituted for their
values. However, our RNG schema allowed only one parameter to be
passed.
Reported-by: NBrian Rak <brak@gameservers.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

docs/schemas/domaincommon.rng

@@ -4530,7 +4530,7 @@
     <attribute name="filter">
       <data type="NCName"/>
     </attribute>
-    <optional>
+    <zeroOrMore>
       <element name="parameter">
         <attribute name="name">
           <ref name="filter-param-name"/>
@@ -4539,7 +4539,7 @@
           <ref name="filter-param-value"/>
         </attribute>
       </element>
-    </optional>
+    </zeroOrMore>
   </define>
 
   <define name="deviceBoot">

tests/domainschemadata/domain-qemu-interface-filterref.xml

+<domain type='kvm'>
+  <name>gentoo</name>
+  <uuid>a75aca4b-a02f-2bcb-4a91-c93cd848c34b</uuid>
+  <memory unit='KiB'>4194304</memory>
+  <currentMemory unit='KiB'>4194304</currentMemory>
+  <memoryBacking>
+    <hugepages>
+      <page size='1048576' unit='KiB' nodeset='0-3'/>
+    </hugepages>
+  </memoryBacking>
+  <vcpu placement='static'>4</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc-i440fx-1.4'>hvm</type>
+    <boot dev='hd'/>
+    <boot dev='cdrom'/>
+  </os>
+  <features>
+    <acpi/>
+    <apic/>
+    <pae/>
+  </features>
+  <cpu mode='custom' match='exact'>
+    <model fallback='allow'>Haswell</model>
+    <vendor>Intel</vendor>
+    <feature policy='require' name='tm2'/>
+    <feature policy='require' name='est'/>
+    <feature policy='require' name='vmx'/>
+    <feature policy='require' name='osxsave'/>
+    <feature policy='require' name='smx'/>
+    <feature policy='require' name='ss'/>
+    <feature policy='require' name='ds'/>
+    <feature policy='require' name='vme'/>
+    <feature policy='require' name='dtes64'/>
+    <feature policy='require' name='abm'/>
+    <feature policy='require' name='ht'/>
+    <feature policy='require' name='acpi'/>
+    <feature policy='require' name='pbe'/>
+    <feature policy='require' name='tm'/>
+    <feature policy='require' name='pdcm'/>
+    <feature policy='require' name='pdpe1gb'/>
+    <feature policy='require' name='ds_cpl'/>
+    <feature policy='require' name='rdrand'/>
+    <feature policy='require' name='f16c'/>
+    <feature policy='require' name='xtpr'/>
+    <feature policy='require' name='monitor'/>
+    <numa>
+      <cell id='0' cpus='0' memory='1048576' unit='KiB'/>
+      <cell id='1' cpus='1' memory='1048576' unit='KiB'/>
+      <cell id='2' cpus='2' memory='1048576' unit='KiB'/>
+      <cell id='3' cpus='3' memory='1048576' unit='KiB'/>
+    </numa>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>restart</on_crash>
+  <pm>
+    <suspend-to-mem enabled='yes'/>
+    <suspend-to-disk enabled='yes'/>
+  </pm>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <disk type='file' device='floppy'>
+      <driver name='qemu' type='raw' cache='none'/>
+      <source file='/var/lib/libvirt/images/fd.img'/>
+      <target dev='fda' bus='fdc'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/gentoo.qcow2'/>
+      <target dev='vda' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/OtherDemo.img'/>
+      <target dev='vdb' bus='virtio'/>
+      <encryption format='qcow'>
+        <secret type='passphrase' uuid='e78d4b51-a2af-485f-b0f5-afca709a80f4'/>
+      </encryption>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
+    </disk>
+    <disk type='file' device='cdrom'>
+      <driver name='qemu' type='raw' cache='none'/>
+      <source file='/home/zippy/tmp/install-amd64-minimal-20140619.iso'/>
+      <target dev='hdc' bus='ide'/>
+      <readonly/>
+      <shareable/>
+      <address type='drive' controller='0' bus='1' target='0' unit='0'/>
+    </disk>
+    <controller type='usb' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <controller type='ide' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
+    </controller>
+    <controller type='virtio-serial' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
+    </controller>
+    <controller type='fdc' index='0'/>
+    <interface type='network'>
+      <mac address='52:54:00:d6:c0:0b'/>
+      <source network='default'/>
+      <bandwidth>
+        <inbound average='100'/>
+        <outbound average='100'/>
+      </bandwidth>
+      <model type='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+    <interface type='bridge'>
+      <mac address='52:54:00:35:82:59'/>
+      <source bridge='br0'/>
+      <model type='rtl8139'/>
+      <filterref filter='myfilter'>
+        <parameter name='CTRL_IP_LEARNING' value='none'/>
+        <parameter name='DHCPSERVER' value='104.156.226.10'/>
+        <parameter name='IP' value='104.207.129.11'/>
+        <parameter name='IP6_ADDR' value='2001:19f0:300:2102::'/>
+        <parameter name='IP6_MASK' value='64'/>
+      </filterref>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
+    </interface>
+    <interface type='server'>
+      <mac address='52:54:00:22:c9:42'/>
+      <source address='127.0.0.1' port='1234'/>
+      <bandwidth>
+        <inbound average='1234'/>
+        <outbound average='5678'/>
+      </bandwidth>
+      <model type='rtl8139'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
+    </interface>
+    <interface type='client'>
+      <mac address='52:54:00:8c:b1:f8'/>
+      <source address='127.0.0.1' port='1234'/>
+      <model type='rtl8139'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
+    </interface>
+    <serial type='pty'>
+      <target port='0'/>
+    </serial>
+    <serial type='pty'>
+      <target port='1'/>
+    </serial>
+    <console type='pty'>
+      <target type='serial' port='0'/>
+    </console>
+    <channel type='unix'>
+      <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/gentoo.org.qemu.guest_agent.0'/>
+      <target type='virtio' name='org.qemu.guest_agent.0'/>
+      <address type='virtio-serial' controller='0' bus='0' port='1'/>
+    </channel>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <graphics type='vnc' port='-1' autoport='yes'/>
+    <sound model='ich6'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </sound>
+    <video>
+      <model type='cirrus' vram='16384' heads='1'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </video>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>