rem: char *getvaldef(section *s, char *name, char *def)
add: getvaldef(section *s, char *name, char *def)
context: char *getvaldef(section *s, char *name, char *def){    nvpair *p;    for(p = s->firstnv; p; p = p->next){        if(!strcmp(p->name,name)) return p->value;    }    return def;}