Added definition of ATTACH_PARENT_PROCESS as of
Changed the requirement _WIN32_WINNT>=0x0501 (WinXP)
to 0x0500 since that's what the above page explicitly says.
Fixed CONSOLE_WINDOWED_MODE as of
It was defined as 0 and according to the above page should be 2.
As always I wish to grant whatever rights I may have to grant to
the MinGW project that are required to include this patch.