test 539: use datacheck mode text for ASCII-mode LISTings

While still using datacheck mode binary for the inline reply data.

tests/data/test539

@@ -12,8 +12,10 @@ FTP
 file contents
 </data>
 
-<datacheck mode="text">
+<datacheck>
 file contents
+</datacheck>
+<datacheck1 mode="text">
 total 20
 drwxr-xr-x   8 98       98           512 Oct 22 13:06 .
 drwxr-xr-x   8 98       98           512 Oct 22 13:06 ..
@@ -25,7 +27,7 @@ drwxrwxrwx   2 98       98           512 May 29 16:04 download.html
 dr-xr-xr-x   2 0        1            512 Nov 30  1995 etc
 drwxrwxrwx   2 98       1            512 Oct 30 14:33 pub
 dr-xr-xr-x   5 0        1            512 Oct  1  1997 usr
-</datacheck>
+</datacheck1>
 </reply>
 
 # Client-side