* s-parame-mingw.adb, s-parame-linux.adb,
s-parame-solaris.adb: Removed, replaced by s-parame.adb
* s-parame-vxworks.ads: Fix typo.
* s-parame-vxworks.adb: New file.
* s-parame.adb: Version now used by all native platforms.
(Default_Stack_Size): Use 2 megs for default stack size and use
__gl_default_stack_size when available.
(Minimum_Stack_Size): Use 12K.
* s-taprop-mingw.adb: Set default stack size linker switch to 2megs.
(Create_Task): Refine implementation taking advantage of the XP stack
size support. On XP, we now create the thread using the flag
STACK_SIZE_PARAM_IS_A_RESERVATION.
* s-osinte-mingw.ads (Stack_Size_Param_Is_A_Reservation): New constant.
* sysdep.c (__gnat_is_windows_xp): New routine, returns 1 on Windows
XP and 0 on older Windows versions.
* interfac-vms.ads: Removed, no longer used.
From-SVN: r111034
