errno.h: ESTRPIPE

[Eric Blake]

> > 2009-03-11  Yaakov Selkowitz <yselkowitz@users.sourceforge.net>
> > 
> > 	* errno.cc (_sys_errlist): Add ESTRPIPE.
> 
> Same question as asked by Ralf on the newlib list.
> 
> What exactly is this patch fixing?  Ok, we get a new error code, but
> what for?  It's not generated from within Cygwin, so...?

And it's not standardized, which means portable code shouldn't use it.

-- 
Eric Blake