Log Message:
stage2/pc_slice.h: add the missing disklabel FS_TYPE #defines and \ 
RF_PROTECTED_SECTORS.
stage2/disk_io.c: adjust the partition start and size by RF_PROTECTED sectors \ 
for partitions of type FS_RAID.
stage2/fsys_ffs.c: accept partitions of type FS_RAID as candidates for FFS, too.
stage2/fsys_ufs2.c: accept partitions of type FS_RAID as candidates for FFSv2, too.

This allows grub to directly boot from NetBSD RAID1 partitions the same way
as with the native bootloader.

Bump PKGREVISION.