set/get timeouts using timevals

new copyright notice

collect tests in soreceive (and add comments); minor fix to avoid setting
m_nextpkt in middle of chain if peeking

fixes from macklem

must test for existence of externalization before peeking into supposed cmsghdr
since it may not be aligned properly if the protocol is managing it differently.

first cut at merged sosend, soreceive for NFS and sockets

tsleep; sblock/sbwait catch/return interrupts; implement lowat,
timeout; move SIGPIPE up to syscall layer; strings for sleep messages

as currently running: control replaces rights entirely,
tsleep round one, something sklower was doing with end-of-record

checkpoint before playing around with EOR conventions (by sklower)

merge in vnodes

checkpoint for version to be handed to NIST, simple tp4 connection

can only use MH_ALIGN on first mbuf, and don't want it on others

working with new mbufs, control (from sklower)

install approved copyright notice

lint

soclose had uninitialized return value

add Berkeley header

release does an splx(s); don't bother doing it earlier

avoid reading past mark if oob data arrives during uiomove

delete unneeded header files

don't remove socket from q's if not freeing
(it confuses sonewconn, which removes it from q itself)

avoid knots

4.3BSD release version

option for receiving OOB data in-line

re-fix consistency problems with input during uiomove,
let uiomove update the vectors (and we can pack things tighter)