Defines starting with `k' in bsd/hfs

• kHFSBlockShift bsd/hfs/hfs.h:570
• kHFSBlockSize bsd/hfs/hfs.h:569
• kHFS_DamagedVolume bsd/hfs/hfs.h:184
• kInstRootClassRef bsd/hfs/hfs_macos_defs.h:1540
• kInvalidID bsd/hfs/hfs_macos_defs.h:459
• kMaxLockedMetaBuffers bsd/hfs/hfs_vfsutils.c:132
• kMaxSecsForFsync bsd/hfs/hfs_vfsutils.c:128