* Makefile.in (DLL_OFILES): Add quotactl.o.

	* Makefile.in (DLL_OFILES): Add quotactl.o.
	* common.din (quotactl): Export.
	* ntdll.h: Define FILE_FS_CONTROL_INFORMATION::FileSystemControlFlags
	flag values.
	(struct _FILE_FS_CONTROL_INFORMATION): Define.
	(struct _FILE_GET_QUOTA_INFORMATION): Define.
	(typedef struct _FILE_QUOTA_INFORMATION): Define.
	(NtQueryObject): Use PVOID rather than VOID*.
	(NtQueryVolumeInformationFile): Ditto.
	(NtQueryQuotaInformationFile): Declare.
	(NtSetQuotaInformationFile): Declare.
	(NtSetVolumeInformationFile): Declare.
	* quotactl.cc: New file implementing quotactl().
	* include/sys/mount.h (BLOCK_SIZE): Define.
	(BLOCK_SIZE_BITS): Define.
	* include/sys/quota.h: New header.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.