script_set_env
script_set_env(ip->client, "", "interface", ip->name);
script_set_env(ip->client, "", "medium", medium);
script_set_env(ip->client, "", "reason", reason);
script_set_env(ip->client, prefix, "ip_address",
script_set_env(ip->client, prefix, "network_number",
script_set_env(ip->client, prefix,
script_set_env(ip->client, prefix, "filename", lease->filename);
script_set_env(ip->client, prefix, "server_name",
script_set_env(ip->client, prefix, name,
script_set_env(ip->client, prefix, "expiry", tbuf);
void script_set_env(struct client_state *, const char *, const char *,