Structs starting with `s' in bsd/netiso

• snpa_hdr bsd/netiso/iso_var.h:148
• snpa_req bsd/netiso/iso_snpac.h:89
• sockaddr_eon bsd/netiso/eonvar.h:102
• sockaddr_iso bsd/netiso/iso.h:166
• systype_req bsd/netiso/iso_snpac.h:103