Revert "Merge branch 'libxl_api_console_xen43_review' of github.com:bjzhang/libvirt into xen42_support_bugfix_20130419_review"

This reverts commit 39260ebc82ad9ef779321e271b1fdd85474df851, reversing
changes made to 93172873dbdfe77bddf4b61ec22688d6180a76ee.