Much improved sosend_*() functions

[Bruce Evans]

On Fri, 29 Sep 2006, John-Mark Gurney wrote:

> Andre Oppermann wrote this message on Fri, Sep 29, 2006 at 23:59 +0200:
>> mbufs are 256 bytes.
>
> Hmmm.. I keep getting this confused... maybe because there was discussion
> about increasing this a few years back...  or maybe because NOTES has
> it as 512.. :)

It would be a bug if NOTES had the default size.  Notes is supposed to
alter defaults so that non-default code paths get tested.  It often uses
the default plus 1 or the default times 2 (the latter when the value must
be a power of 2).

Bruce