Defines starting with `n' in ufs/ufs

• NDADDR ufs/ufs/dinode.h:49
• NEWDIRFMT ufs/ufs/dir.h:109
• NIADDR ufs/ufs/dinode.h:50
• NODQUOT ufs/ufs/quota.h:153
• NOLOCKF ufs/ufs/ufs_lockf.c:63