K 10
svn:author
V 7
rwatson
K 8
svn:date
V 27
2008-10-01T13:26:52.609875Z
K 7
svn:log
V 716
Various cleanups for soreceive_dgram():

- Update or remove comments that were left over from the original
  soreceive_generic() implementation.  Quite a few were misleading in the
  context of the new code.
- Since soreceive_dgram() has a simpler structure, replace several gotos
  with a while loop making the invariants more clear.
- In the blocking while loop, don't try to handle cases incompatible with
  the loop invariant (since m is always NULL, don't check for and handle
  non-NULL).
- Don't drop and re-acquire the socket buffer lock unnecessarily after
  sbwait() returns, which may help reduce lock contention (etc).
- Assume PR_ATOMIC since we assert it at the top of the function.

MFC after:	3 days

END