Defines starting with `n' in ufs/ufs

• NDADDR ufs/ufs/dinode.h:65
• NEWDIRFMT ufs/ufs/dir.h:123
• NIADDR ufs/ufs/dinode.h:66
• NODQUOT ufs/ufs/quota.h:153
• NOLOCKF ufs/ufs/ufs_lockf.c:66