update: default to follow all symlinks

MPD 0.13 and older followed all symbolic links.  Although this can be
a security problem (as it has always been), 0.14 should offer the same
default behaviour as 0.13.

src/update.c

@@ -59,7 +59,7 @@ static struct condition delete_cond;
 
 enum {
 	DEFAULT_FOLLOW_INSIDE_SYMLINKS = true,
-	DEFAULT_FOLLOW_OUTSIDE_SYMLINKS = false,
+	DEFAULT_FOLLOW_OUTSIDE_SYMLINKS = true,
 };
 
 static bool follow_inside_symlinks;