in case the select() returns -1 and errno is EINTR, it should not abort

the download (MT-adjustment)

lib/download.c

@@ -194,6 +194,13 @@ Transfer (struct UrlData *data,
 
       switch (select (maxfd, &readfd, &writefd, NULL, &interval)) {
       case -1:			/* select() error, stop reading */
+#ifdef EINTR
+        /* The EINTR is not serious, and it seems you might get this more
+           ofen when using the lib in a multi-threaded environment! */
+        if(errno == EINTR)
+          ;
+        else
+#endif
           keepon = 0; /* no more read or write */
 	continue;
       case 0:			/* timeout */