OptSet
int result = OptSet(arg);
{"filter-decapsulation", NULL, OptSet, LOCAL_AUTH,
{"force-scripts", NULL, OptSet, LOCAL_AUTH,
{"idcheck", NULL, OptSet, LOCAL_AUTH, "Check FSM reply ids",
{"ipcp", NULL, OptSet, LOCAL_AUTH, "IP Network Control Protocol",
{"ipv6cp", NULL, OptSet, LOCAL_AUTH, "IPv6 Network Control Protocol",
{"keep-session", NULL, OptSet, LOCAL_AUTH, "Retain device session leader",
{"loopback", NULL, OptSet, LOCAL_AUTH, "Loop packets for local iface",
{"nas-ip-address", NULL, OptSet, LOCAL_AUTH, "Send NAS-IP-Address to RADIUS",
{"nas-identifier", NULL, OptSet, LOCAL_AUTH, "Send NAS-Identifier to RADIUS",
{"passwdauth", NULL, OptSet, LOCAL_AUTH, "Use passwd file",
{"proxy", NULL, OptSet, LOCAL_AUTH, "Create a proxy ARP entry",
{"proxyall", NULL, OptSet, LOCAL_AUTH, "Proxy ARP for all remote hosts",
{"sroutes", NULL, OptSet, LOCAL_AUTH, "Use sticky routes",
{"tcpmssfixup", "mssfixup", OptSet, LOCAL_AUTH, "Modify MSS options",
{"throughput", NULL, OptSet, LOCAL_AUTH, "Rolling throughput",
{"utmp", NULL, OptSet, LOCAL_AUTH, "Log connections in utmp",