Io_page: fixed the UNIX backend as well.
Netif/UNIX: For some reason, get_while does block forever.
unix: install shouldn't remove 'xenctrl' package

The xen backend 'provides' a 'xenctrl' package, but the unix backend
doesn't -- you should use the separate userspace C bindings.
Merge pull request #49 from djs55/fix-xenctrl

unix: install shouldn't remove 'xenctrl' package
Merge pull request #48 from pgj/master

FreeBSD-specific build fixes
reverted the Console modifs in CHANGE also.