#include <u.h>#include <libc.h>#include <authsrv.h>#include <bio.h>#include <ndb.h> intauthdial(char *netroot, char *dom){	char server[Ndbvlen];	Ndbtuple *nt; 		if(dom != nil){		/* look up an auth server in an authentication domain */		nt = csgetval(netroot, "authdom", dom, "auth", server); 		/* if that didn't work, just try the IP domain */		if(nt == nil)			nt = csgetval(netroot, "dom", dom, "auth", server);		if(nt == nil){			werrstr("no auth server found for %s", dom);			return -1;		}		ndbfree(nt);		return dial(netmkaddr(server, netroot, "ticket"), 0, 0, 0);	} else {		/* look for one relative to my machine */		return dial(netmkaddr("$auth", netroot, "ticket"), 0, 0, 0);	}}