Defines starting with `b' in bsd/dev

• BAD_BLK_OFF bsd/dev/disk.h:93
• b_cylin bsd/dev/vnd.c:116
• __Bounds__ bsd/dev/ev_types.h:182
• _BSD_DEV_DISK_ bsd/dev/disk.h:63
• _BSD_DEV_DISK_LABEL_ bsd/dev/disk_label.h:35
• _BSD_DEV_KMREG_COM_ bsd/dev/kmreg_com.h:37
• _BSD_DEV_SCSIREG_ bsd/dev/scsireg.h:50
• _BUSVAR_ bsd/dev/busvar.h:36