Defines starting with `s' in bsd/netat

• SCBS_PER_BLK bsd/netat/asp_proto.c:54
• SESS_TMO_RES bsd/netat/asp_proto.c:56
• SIP_BAD_RESPONSE bsd/netat/ddp_sip.c:71
• SIP_DATALINK_CMD bsd/netat/ddp_sip.c:68
• SIP_DRIVER_VERSION bsd/netat/ddp_sip.c:73
• SIP_GOOD_RESPONSE bsd/netat/ddp_sip.c:70
• SIP_RESPONDER_VERSION bsd/netat/ddp_sip.c:74
• SIP_SYSINFO_CMD bsd/netat/ddp_sip.c:67