[libvirt] [PATCH v2 0/5] nwfilter: Support comment attribute in filter rule descriptions

[Stefan Berger]

V2:
 - work on the iptables instantiation patch (2/5)
 - work on the parser patch (1/5)
 - small changes to the test cases (5/5)

The following patch series adds support for a comment node to the XML
attributes of all protocols. If possible, as for example in case of iptables,
the comments are instantiated (iptables ... -m comment --comment ...).

The patches do the following:
- extend the parser and XML generator to parse and create XML with the 
  comment attribute
- instantiate the comment in case of ip(6)tables
- extend the nwfilter.rng schema with the comment attribute
- add the information to the web docs
- add a test case for the XML parser/generator to be run during 'make check'


  Regards,
    Stefan