Per subject; if autoport is in use for a host, the current
virDomainGraphicsDefFormat code always emits "port=-1", even if a port
is assigned to the host; this leaves no way for a client to find the VNC
port assigned to the host in question.

This patches fixes it by putting the vncport in place if there is one, and
only putting "-1" if we fail that test.

* src/domain_conf.[ch] src/openvz_conf.[ch] src/openvz_driver.c:
  patch from Evgeniy Sokolov doing the OpenVZ xml refactoring,
  still needs to be ported to the new XML parsing code but
  implements the new format.
Daniel

* src/domain_conf.c (virDomainChrDefParseXML)
(virDomainNetDefParseXML): Likewise.
* src/iptables.c (iptRuleFree): Likewise.
* src/storage_backend.c (virStorageBackendRunProgRegex): Likewise.
* src/test.c (testOpenFromFile): Likewise.
* src/xmlrpc.c (xmlRpcCallRaw): Likewise.

* src/domain_conf.c (virDomainReportError): Declare using
ATTRIBUTE_FORMAT(printf, 3, 4).
* Makefile.maint (msg_gen_function): Add virDomainReportError.