Defines starting with `v' in bsd/dev

• VDB_FOLLOW bsd/dev/vnd.c:111
• VDB_INIT bsd/dev/vnd.c:112
• VDB_IO bsd/dev/vnd.c:113
• VNDIOCCLR bsd/dev/vndioctl.h:83
• VNDIOCSET bsd/dev/vndioctl.h:82
• VNF_ALIVE bsd/dev/vnd.c:140
• VNF_INITED bsd/dev/vnd.c:141
• _VOLDEV_ bsd/dev/voldev.h:38