Structs starting with `s' in bsd/netiso

• snpa_hdr bsd/netiso/iso_var.h:145
• snpa_req bsd/netiso/iso_snpac.h:86
• sockaddr_eon bsd/netiso/eonvar.h:99
• sockaddr_iso bsd/netiso/iso.h:163
• systype_req bsd/netiso/iso_snpac.h:100