$Id: CHANGES,v 1.21 2006/10/22 01:06:44 thepooka Exp $

20050831:	initial revision

20060930:	support -current as of yesterday
		make mounting more sensible

20061001:	handle unmount
		unmount cleanly (as far as possible) if userspace
		    handler dies

20061002:	support kauth, rework user lib credentials
		add support for mounting puffs multiple times

20061004:	implement pathconf, advlock and print

20061005:	add support for select()/poll()
		support a nonblocking programming model on /dev/puffs
		    and in libpuffs
		add support for simple kevents on top of /dev/puffs

20061006:	unlock and relock vnodes around the userspace dance
		play around with the library interface
		nuke hardcodefs, it served its purpose
		introduce detrempefs, a simple in-memory filesystem,
		    which will eventually look like a regular
		    general-purpose fs

20061007:	support mkdir.  it is now possible to dynamically build
		    directory hierarchies

20061008:	fix bugs and implement features.  it is now possible to
		    pax -rw a directory hierarchy onto puffs and have
		    diff -r against the original return success

20061009:	implement bookkeeping in detrempefs.  du, df, etcetc.
		    now work
		zero out all memory being passed to userspace to avoid
		    accidentally leaking kernel mem
		support hard links
		support symbolic links

20061010:	bugfixes, cleanup

20061011:	rework root vnode handling, much more reliable now and
		    unmount correctly returns busy if the fs is busy
		    instead of going on a rampage and nuking everything

20061012:	fix bug in detrempefs where it did not correctly zero
		    storage when a file was extended
		introduce puffsrw_max to kludge around a mysterious
		    uiomove() bug

20061014:	don't allow to execute files yet (VOP_GETPAGES is missing)

20061019:	"unwrap" user-kernel transport structures for the libpuffs
		    interface, i.e. have function prototypes have an argument
		    for each actual parameter
		cluster readdir requests instead of always transferring
		    one per request

20061020:	use auxbuf to require only one trip to userspace for read/write
		loop read/write inside the vnode op in an attempt to satisfy
		    the entire request

20061021:	fix userspace request buffer management
		poolize struct puffs_node's
		separate struct puffs_req into two structures according to
		    usance instead of tightroping with just one.  clarifies
		    especially read/readdir