nr_files conflict with filename

If nr_files is larger than the given number of files, it has
to be lowered. Assume that if the user gives a set of filenames
that this is the number he wants, otherwise he should use not
use a filename setting.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/engines/net.c b/engines/net.c
index c2f45e5..cd1fda9 100644
--- a/engines/net.c
+++ b/engines/net.c
@@ -239,9 +239,9 @@
 
 	strcpy(buf, td->filename);
 
-	sep = strchr(buf, ':');
+	sep = strchr(buf, '/');
 	if (!sep) {
-		log_err("fio: bad network host:port <<%s>>\n", td->filename);
+		log_err("fio: bad network host/port <<%s>>\n", td->filename);
 		return 1;
 	}