Defines in miscfs/union

• NHASH miscfs/union/union_subr.c:57
• UN_DIRMODE miscfs/union/union.h:65
• UN_FILEMODE miscfs/union/union.h:66
• UN_KLOCK miscfs/union/union.h:89
• UN_LOCKED miscfs/union/union.h:87
• UNMNT_ABOVE miscfs/union/union.h:45
• UNMNT_BELOW miscfs/union/union.h:46
• UNMNT_OPMASK miscfs/union/union.h:48
• UNMNT_REPLACE miscfs/union/union.h:47
• UN_ULOCK miscfs/union/union.h:88
• UN_WANT miscfs/union/union.h:86
• VRWMODE miscfs/union/union.h:64
• VRWXMODE miscfs/union/union.h:63