PERFORCE change 105906 for review

[Robert Watson]

On Wed, 27 Sep 2006, Marcin Cieslak wrote:

> It may happen that implementing delivery of the process ID of the other side 
> of the socket - feature not available AFAIK in the FreeBSD right now - will 
> impose on us much deeper dive into internal socket structures.

The notion of "The process ID on the other side of a socket" is nonsensical. 
There may be zero, one, or many processes hooked up to a socket.  The 
situations in which you can point clearly at a process or credential are the 
process/credential that called connect (if any), and the process/credential 
that sent a message.  This is the distinction between LOCAL_CREDS and 
SCM_CREDS, FYI.

Robert N M Watson
Computer Laboratory
University of Cambridge