All symbols starting with `n' in ufs/ffs

• nextgennumber ufs/ffs/ffs_alloc.c:53
• NINDIR ufs/ffs/fs.h:498
• NSPB ufs/ffs/fs.h:486
• NSPF ufs/ffs/fs.h:487
• NULL ufs/ffs/ffs_vnops.c:113
• numfrags ufs/ffs/fs.h:447