Import revision 295 of the program_options library.
Make test Jamfile work with regression tests.
Don't redefine default value.
Random attempt to fix vc7 bug
Add missing include
Don't use trailing comma in enumerators, this appears to be
non-standard usage.
Account for the fact that std::strncmp has "C" linkage, and some
compilers don't allow to use functions with different linkage as branches
of ?: operator.
Integrate program_options into main Boost.Book docs.
Use _putenv, not setenv, on Win32.
Try to handle the case the intel does not have strncmp in std:: namespace.
Try to enable locale/facet support for metrowerks.
Declare the 'environ' variable, since it's not always declared in headers,
even on Posix systems.
Change size_t to unsigned in one place.
Polish the front page
Try to workaround mbstate_t problems on intel.
Fix typo.
Fix line endings.
Added missing "template<>".
Replace string::push_back with string::operator+=.
Metrowerks does not seem to provide '_environ', use 'envrion' in that case.