strerror: Update documentation

[Bruno Haible]

The idiom used to declare strerror() in lib/string.in.h does not cope with
the case of a missing strerror function (at least not in C++ mode). But
such platforms are likely older than 1998. Therefore I don't think they
are relevant any more.


2010-04-04  Bruno Haible  <address@hidden>

        strerror: Update documentation.
        * doc/posix-functions/strerror.texi: Remove mention of old platforms.

--- doc/posix-functions/strerror.texi.orig      Sun Apr  4 23:05:08 2010
+++ doc/posix-functions/strerror.texi   Sun Apr  4 23:04:27 2010
@@ -9,8 +9,6 @@
 Portability problems fixed by Gnulib:
 @itemize
 @item
-This function is missing on some old platforms.
address@hidden
 This function does not support the error values that are specified by POSIX
 but not defined by the system, on some platforms:
 OpenBSD 4.0, OSF/1 5.1, Cygwin 1.5.x, mingw.