Genie:  Pass node& to reg filehandle constructors
Genie:  Elide RegularFileHandle
Genie:  Axe obsolete RegularFileHandle
Merge branch 'axe-RegularFileHandle'
Pedestal:  Axe superfluous seize_ptr()

This might have been useful with shared_ptr, but not with intrusive_ptr.
vfs:  Fix dir_contents leak in dir_contents_box
Genie:  Eradicate use of IOPtr typedef
mac-sys-utils:  Add default_thread_stack_size()
Genie:  Use mac::sys::default_thread_stack_size()
mac-sys-utils:  Add temp_free_mem()
Genie:  Use mac::sys::temp_free_mem()
mac-sys-utils:  Add free_mem()
mac-sys-utils:  Add heap_size()
Genie:  Use mac::sys routines in /sys/app handlers
Merge branch 'mac-sys'
[NEW] pass_fd:  Library of send_fd() and recv_fd()
pass_fd:  Rename cmsg_alloc to cmsg_fd_alloc

It's better documentation and we don't want to risk a collision with any
future cmsg types in unet.
[FIX] pass_fd:  Avoid CMSG_LEN() in array bounds

This works fine in g++ 4.0, clang, and Metrowerks, but g++ 4.2 hates it.
[NEW] uloop
poseven:  Add fd_pair type