Rather than numerous instances of:

emulator = vm->def->emulator;
if (!emulator)
    emulator = virDomainDefDefaultEmulator(conn, vm->def, driver->caps);
if (!emulator)
    return -1;

Set this value at XML parse time in the domain config, so we can depend on
it for all future emulator accesses. There were unchecked accesses in the
qemu driver that were tripping up on this if no emulator was specified in
the XML, see:

http://www.redhat.com/archives/libvir-list/2008-October/msg00602.html

* src/opennebula/one_conf.[ch] src/opennebula/one_driver.[ch]:
  the OpenNebula driver
* configure.in include/libvirt/virterror.h qemud/Makefile.am
  qemud/qemud.c src/Makefile.am src/domain_conf.[ch] src/driver.h
  src/libvirt.c src/virterror.c: integration of the OpenNebula
  driver in the libvirt infrastructure
* AUTHORS: add Abel Miguez Rodriguez
daniel

* docs/schemas/domain.rng src/domain_conf.[ch] src/qemu_driver.c:
  extend the generic code for the RDP and desktop extensions of
  the graphic tag needed for vbox, patch by Pritesh Kothari
Daniel

* src/domain_conf.[ch] docs/schemas/domain.rng: add support
  for internal network in the generic part of the code, and
  update the Relax-NG grammar accordingly, patch by Pritesh Kothari
daniel

* src/domain_conf.c src/domain_conf.h: parse and save multiple
  graphics elements instead of one, patch by Pritesh Kothari
* src/qemu_conf.c src/qemu_driver.c: adapt the qemu/kvm driver for
  the new structures, patch by Pritesh Kothari
* src/xend_internal.c src/xm_internal.c: same thing for Xen drivers
Daniel

* configure.in include/libvirt/virterror.h src/Makefile.am
  src/domain_conf.[ch] src/driver.h src/virterror.c src/vbox/README
  src/vbox/vbox_CAPI_v2_2.h src/vbox/vbox_V2_2.c
  src/vbox/vbox_XPCOMCGlue.[ch] src/vbox/vbox_driver.[ch]
  src/vbox/vbox_tmpl.c: integration of the VirtualBox support
  patches by Pritesh Kothari
Daniel

* docs/schemas/domain.rng src/domain_conf.c src/domain_conf.h
  src/qemu_conf.c
  tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.xml
  tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-address.xml
  tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-product.xml:
  adds a new <hostdev managed='(yes|no)'> property
  to host devices indicating whether or not we should
  automatically dettach/reset, patch by Mark McLoughlin
daniel

        connection error, which may not have been set.

* src/uml_conf.c (VIR_FROM_THIS): Define to VIR_FROM_UML.
* src/xs_internal.c (VIR_FROM_THIS): Define to VIR_FROM_XEN.
* src/xml.c (VIR_FROM_THIS): Define to VIR_FROM_XML.
* src/stats_linux.c (VIR_FROM_THIS): Define to VIR_FROM_STATS_LINUX.
* src/datatypes.c (VIR_FROM_THIS): Define to VIR_FROM_NONE.
* src/lxc_conf.c (VIR_FROM_THIS): Define to VIR_FROM_LXC.
* src/libvirt.c (VIR_FROM_THIS): Define to VIR_FROM_NONE.
* src/node_device_conf.c (VIR_FROM_THIS): Define to VIR_FROM_NODEDEV.
* src/openvz_conf.c (VIR_FROM_THIS): Define to VIR_FROM_OPENVZ.
* src/openvz_driver.c (VIR_FROM_THIS): Define to VIR_FROM_OPENVZ.
* src/conf.c (VIR_FROM_THIS): Define to VIR_FROM_CONF.
Note: this loses config_filename:config_lineno diagnostics,
but that's ok.
* src/node_device.c (VIR_FROM_THIS): Define to VIR_FROM_NODEDEV.
* src/sexpr.c (VIR_FROM_THIS): Define to VIR_FROM_SEXPR.
* po/POTFILES.in: remove src/sexpr.c and src/lxc_conf.c

  for recent KVM versions in a similar way to USB, patch by
  Jason Krieg. Some cleanups and reformating too.
daniel