Expose virDomainInterfacesAddresses to python binding

examples/Makefile.am:
  * Add new file domipaddrs.py

examples/README:
  * Add documentation for the python example

libvirt-override-api.xml:
  * Add new symbol for virDomainInterfacesAddresses

libvirt-override.c:
  * Hand written python api

Example:
  $ python examples/domipaddrs.py qemu:///system f18
    Interface  MAC address          Protocol     Address
    vnet0      52:54:00:20:70:3d    ipv4         192.168.105.240/16

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>

examples/README

@@ -11,6 +11,7 @@ domrestore.py - restore domU's from their saved files in a directory
 esxlist.py  - list active domains of an VMware ESX host and print some info.
               also demonstrates how to use the libvirt.openAuth() method
 dhcpleases.py - list dhcp leases for a given virtual network
+domipaddrs.py - list IP addresses for guest domains
 
 The XML files in this directory are examples of the XML format that libvirt
 expects, and will have to be adapted for your setup. They are only needed

examples/domipaddrs.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+# domipaddrs - print domain interfaces along with their MAC and IP addresses
+
+import libvirt
+import sys
+
+def usage():
+    print "Usage: %s [URI] DOMAIN" % sys.argv[0]
+    print "        Print domain interfaces along with their MAC and IP addresses"
+
+uri = None
+name = None
+args = len(sys.argv)
+
+if args == 2:
+    name = sys.argv[1]
+elif args == 3:
+    uri = sys.argv[1]
+    name = sys.argv[2]
+else:
+    usage()
+    sys.exit(2)
+
+conn = libvirt.open(uri)
+if conn == None:
+    print "Unable to open connection to libvirt"
+    sys.exit(1)
+
+try:
+    dom = conn.lookupByName(name)
+except libvirt.libvirtError:
+    print "Domain %s not found" % name
+    sys.exit(0)
+
+ifaces = dom.interfaceAddresses(libvirt.VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE);
+if (ifaces == None):
+    print "Failed to get domain interfaces"
+    sys.exit(0)
+
+print " {0:10} {1:20} {2:12} {3}".format("Interface", "MAC address", "Protocol", "Address")
+
+def toIPAddrType(addrType):
+    if addrType == libvirt.VIR_IP_ADDR_TYPE_IPV4:
+        return "ipv4"
+    elif addrType == libvirt.VIR_IP_ADDR_TYPE_IPV6:
+        return "ipv6"
+
+for (name, val) in ifaces.iteritems():
+    if val['addrs']:
+        for addr in val['addrs']:
+           print " {0:10} {1:19}".format(name, val['hwaddr']),
+           print " {0:12} {1}/{2} ".format(toIPAddrType(addr['type']), addr['addr'], addr['prefix']),
+           print
+    else:
+        print " {0:10} {1:19}".format(name, val['hwaddr']),
+        print " {0:12} {1}".format("N/A", "N/A"),
+        print