[sane-devel] Minor network code change could use more testers

[Chris Bagwell]

Hi all,

I needed a secondary platform to do some automake tests on; besides 
linux; but the two I tried wouldn't compile (cygwin and solaris) even 
without automake support.  So I've submitted a few portability improvements.

The changes to remove MSG_NOWAIT and MSG_WAITALL could use a little 
testing in the epson2 and pixma (bjnp) backends. Also, changes seem safe 
but could use a review.

I could only verify that epson2 changes continue to work same as before 
with my Epson Artisan 800 networked scanner (only "scanimge -L" 
currently works).

Chris