Defines starting with `u' in bsd/ufs/ufs

• _UFS_BYTE_ORDER_H_ bsd/ufs/ufs/ufs_byte_order.h:39
• ufs_lease_check bsd/ufs/ufs/ufs_extern.h:101
• ufs_revoke bsd/ufs/ufs/ufs_extern.h:120
• um_fs bsd/ufs/ufs/ufsmount.h:94
• um_lfs bsd/ufs/ufs/ufsmount.h:95
• USRQUOTA bsd/ufs/ufs/quota.h:87