Tidy up VC10 config and enable new VC10 feature (numeric_limits::lowest()).

svn path=/trunk/boost/config/; revision=66455
MingW32 has a few functions we weren't flagging up before.

svn path=/trunk/boost/config/; revision=66469
Add some more macros to diagnostic list

svn path=/trunk/libs/config/; revision=66492
Update last checked GCC version to 4.6, and add new C++0x features supported.

svn path=/trunk/boost/config/; revision=66585
Normalise BOOST_NO_VARIADIC_TEMPLATES and BOOST_HAS_VARIADIC_TEMPL usage.

svn path=/trunk/boost/config/; revision=66654
Added BOOST_HAS_FENV_H detection to Boost.Config (if this macro is defined, then
the standard library/platform provide a POSIX compliant implementation of fenv.h).


svn path=/trunk/boost/config/; revision=66693
Added *nix identification macros to Boost.Config; BOOST_NIX, BOOST_GENETIC_NIX,
BOOST_TRADEMARK_NIX and BOOST_FUNCTIONAL_NIX.


svn path=/trunk/boost/config/; revision=66696
Apply Vincente Botet's patches for BOOST_CONSTEXPR.

svn path=/trunk/boost/config/; revision=66746
Should fix issue with fenv.h detection on Darwin.


svn path=/trunk/boost/config/; revision=66762
Revert last patch - it conflicts with existing definition.

svn path=/trunk/boost/config/; revision=66783
Added *nix identification macros to Boost.Config; BOOST_NIX, BOOST_GENETIC_NIX,
BOOST_TRADEMARK_NIX and BOOST_FUNCTIONAL_NIX.


svn path=/trunk/boost/config/; revision=66804
Fix for variadic macro support.

svn path=/trunk/boost/config/; revision=66824
Fix unistd.h include guards.


svn path=/trunk/boost/config/; revision=66833
Forget a ')'.


svn path=/trunk/boost/config/; revision=66834
Don't undef BOOST_AUTO_LINK_NOMANGLE.
Refs #4902.

svn path=/trunk/boost/config/; revision=66906
Merge 1.46.0 prep.

svn path=/branches/release/boost/config.hpp; revision=66993
Merged r66286, r66707, r66900, and r66907 from trunk

svn path=/branches/release/boost/config.hpp; revision=67007
Merged r67008 from trunk

svn path=/branches/release/boost/config.hpp; revision=67009
Merged r67011 from trunk

svn path=/branches/release/boost/config.hpp; revision=67013
Merged r67014 from trunk

svn path=/branches/release/boost/config.hpp; revision=67015