[boost] [system] LWG issue 805 name changes applied

From: Beman Dawes (bdawes_at_[hidden])
Date: 2008-06-24 11:11:18

The C++ committee's LWG issue 805 has been applied to Boost.System in 
trunk, using a namespace and enum as a workaround for non-availability 
of C++ scoped enums. This changes names:

    posix_errno -> errc
    posix_category -> generic_category
    get_posix_category -> get_generic_category
    "POSIX" -> "GENERIC"

The old names are still supported as deprecated synonyms, so virtually 
no existing code is expected to break. The changes tested OK locally on 
Windows against Boost.Filesystem and Boost.ASIO.

Let me know if any problems arise.

Thanks,

--Beman