Defines starting with `n' in ufs/ufs

• NDADDR ufs/ufs/dinode.h:54
• NEWDIRFMT ufs/ufs/dir.h:114
• NIADDR ufs/ufs/dinode.h:55
• NODQUOT ufs/ufs/quota.h:153
• NOLOCKF ufs/ufs/ufs_lockf.c:63