Macros starting with `u' in BSD4-4

• UIHASH kern/kern_proc.c:62
• UIOCCMD sys/ttycom.h:117
• UIOMOVE net/bpf.c:92
• UMAP_NHASH miscfs/umapfs/umap_subr.c:53
• UMAPTOV miscfs/umapfs/umap.h:82
• UMAPVPTOLOWERVP miscfs/umapfs/umap.h:85
• UNION_HASH miscfs/union/union_subr.c:60
• UNIONTOV miscfs/union/union.h:110
• UNIT i386/isa/com.c:110
• UPPERVP miscfs/union/union.h:112
• USES_PDN netiso/tp_pcb.h:262