Defines starting with `b' in bsd/netat

• B_CTL_CLOSE bsd/netat/adsp_internal.h:270
• B_CTL_FRESET bsd/netat/adsp_internal.h:271
• B_CTL_FRESETACK bsd/netat/adsp_internal.h:272
• B_CTL_OACK bsd/netat/adsp_internal.h:267
• B_CTL_ODENY bsd/netat/adsp_internal.h:269
• B_CTL_OREQ bsd/netat/adsp_internal.h:266
• B_CTL_OREQACK bsd/netat/adsp_internal.h:268
• B_CTL_PROBE bsd/netat/adsp_internal.h:265
• B_CTL_RETRANSMIT bsd/netat/adsp_internal.h:273
• BRIDGE_ADDR bsd/netat/ddp.c:516
• BRT_BSIZ bsd/netat/at_ddp_brt.h:43
• BRT_EMPTY bsd/netat/at_ddp_brt.h:48
• BRT_ENTRY bsd/netat/ddp.c:515
• BRT_GETTING_OLD bsd/netat/at_ddp_brt.h:52
• BRT_NB bsd/netat/at_ddp_brt.h:44
• BRTSIZE bsd/netat/at_ddp_brt.h:45
• BRT_SWEEP_INT bsd/netat/at_ddp_brt.h:42
• BRT_VALID bsd/netat/at_ddp_brt.h:50