* src/esx/esx_vi.[ch]: use virXPathNode*() in
  esxVI_RemoteRequest_Execute() and remove
  esxVI_RemoteResponse_DeserializeXPathObject*()
* src/esx/esx_vi_methods.c: update callers to use the new syntax of
  esxVI_RemoteRequest_Execute()

* src/esx/esx_driver.c: add configStatus to the requested properties
  to check it in esxVI_GetVirtualMachineIdentity()
* src/esx/esx_vi.[ch]: add esxVI_GetManagedEntityStatus()
  and use it in esxVI_GetVirtualMachineIdentity()
* src/esx/esx_vi_types.[ch]: add VI type esxVI_ManagedEntityStatus

* src/esx/esx_driver.c: handle spaces in VMX file path and use a
  virBuffer to encode spaces correctly in the resulting URL
* src/esx/esx_vi.c: include the URL in the error message in case
  of a download error

* src/esx/esx_vi.c (esxVI_Enumeration_Deserialize): Fix
reversed goto and result=-1 statements.

* src/esx/esx_driver.c src/esx/esx_util.[ch] src/esx/esx_vi.[ch]:
  just a name change

* src/esx/esx_driver.c src/esx/esx_vi.[ch] src/esx/esx_vmx.[ch]:
  adds version checking for GSX 2.0, allows to pass a specific port
  for the connection and also add a new specific gsx scheme for
  easier connections to GSX hosts

* src/esx/esx_vi.c: drop host check if no_verify=1, but as Matthias
  pointed out if no_verify=2 we should check the host is the right
  one

* src/esx/esx_driver.c src/esx/esx_vi.c src/esx/esx_vi.h
  src/esx/esx_vmx.c src/esx/esx_vmx.h: extend the VI API version checks
  to accept version 4.0 and takes care of the virtualHW.version change
  from 4 to 7.

* src/esx/esx_driver.c src/esx/esx_util.c src/esx/esx_util.h
  src/esx/esx_vi.c src/esx/esx_vi.h: adds a no_verify query parameter to
  stop libcurl from verifying theserver certificate for the https
  transport.

* src/esx/esx_*.[ch]: the driver, uses a remote minimal SOAP client
  to talk to the VI services on ESX nodes.
* configure.in include/libvirt/virterror.h src/Makefile.am src/driver.h
  src/libvirt.c src/virterror.c: glue in the new driver