cleanup, daniel

docs/analysis

-arch/xen/kernel/evtchn.c: Communication via Xen event channels
-->HYPERVISOR_xen_version call 
-->HYPERVISOR_physdev_op call
-->HYPERVISOR_event_channel_op call
--> global HYPERVISOR_shared_info
-
-arch/xen/kernel/fixup.c: binary rewrinting for threads TLS
--> message to suppress... + boot delay
-
-arch/xen/kernel/gnttab.c: memory access and sharing
-  inline assemby from privcmd.c using TRAP_INSTR macro to do an hypervisor
-  call apparently.
-
-arch/xen/kernel/reboot.c: 
--> HYPERVISOR_suspend call
-
-include/asm-xen/asm-i386/hypercall.h:
--> assembly macro for the hypervisor calls
-
-tools/libxc/xc_*.c: library for xen control
-
-tools/libxc/xc_private.h:
-  -> Xen hypervisor call is an ioctl() with an privcmd_hypercall_t parameter
-  xc_domain.c:
-  -> API for all domain supervisor calls, create, memory, cpu weight, destroy
-
-=> Fraser all over the place ...
-
-/Xen/xen-unstable.hg/tools/libxc
-
-
-  The hypervisor calls are defined as inlined functions in xc_private.h
-This is GPL and not installed.