[Libguestfs] [PATCH] Rejig configure.ac tests for qemu vmchannel support.

The change to "null vmchannel" didn't get reflected in the configure script which still checks for vmchannel in qemu. This patch tidies up this part of the configure script so we don't fail, provided we have support for user mode networking (which is required for null vmchannel). This patch didn't make it into 1.0.71. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 75 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora