darcs patch: Use CSockLen when appropriate (and 2 more)

[Lennart Kolmodin]

Wed Sep  5 22:30:41 CEST 2007  Lennart Kolmodin <kolmodin at dtek.chalmers.se>
  * Use CSockLen when appropriate

Thu Sep  6 06:21:13 CEST 2007  Lennart Kolmodin <kolmodin at dtek.chalmers.se>
  * alloca and poke is a 'with'

Sat Sep  8 12:02:17 CEST 2007  Lennart Kolmodin <kolmodin at dtek.chalmers.se>
  * Fix abstract unix sockets
  Using abstract unix sockets is a bit different than regular unix sockets.
  Abstract unix sockets are identified with that the path starts with a zero
  and doesn't have the trailing zero.
  
  Thus, this patch contains the following changes:
  1) Correctly count the bytes used in a unix socket address.
  2) Make peekSockAddr aware the socked address length.
       The old implementation relied on a zero terminated path, which abstract
       unix sockets are not.
  3) Update other functions to respect address length.
  4) A bit of cleanup and use of CSockLen instead of CInt.
  
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