Fix missing conn_t locks

The conn_t lock must be held by the caller for conn_setup and
reactivate_connection.

Ref: axel-download-accelerator#294
Signed-off-by: Ismael Luceno <ismael@iodev.co.uk>

src/axel.c

@@ -410,7 +410,9 @@ axel_start(axel_t *axel)
 
 	for (i = 0; i < axel->conf->num_connections; i++) {
 		if (axel->conn[i].currentbyte > axel->conn[i].lastbyte) {
+			pthread_mutex_lock(&axel->conn[i].lock);
 			reactivate_connection(axel, i);
+			pthread_mutex_unlock(&axel->conn[i].lock);
 		} else if (axel->conn[i].currentbyte < axel->conn[i].lastbyte) {
 			if (axel->conf->verbose >= 2) {
 				axel_message(axel,

src/conn.c

@@ -386,8 +386,10 @@ conn_info(conn_t *conn)
 
 		conn->supported = true;
 		conn->currentbyte = 0;
+		pthread_mutex_lock(&conn->lock);
 		if (!conn_setup(conn))
 			return 0;
+		pthread_mutex_unlock(&conn->lock);
 		conn_exec(conn);
 		conn_disconnect(conn);
 

src/search.c

@@ -136,9 +136,17 @@ search_makelist(search_t *results, char *orig_url)
 	memset(conn, 0, sizeof(conn_t));
 	conn->conf = results->conf;
 
-	if (!conn_set(conn, s) || !conn_setup(conn) || !conn_exec(conn))
+	if (!conn_set(conn, s))
 		goto done;
 
+	{
+		pthread_mutex_unlock(&conn->lock);
+		int tmp = conn_setup(conn);
+		pthread_mutex_unlock(&conn->lock);
+		if (!tmp || !conn_exec(conn))
+			goto done;
+	}
+
 	{
 		int j = 0;