updated for version 7.3.597

Problem:    'clipboard' "autoselect" only applies to the * register. (Sergey
            Vakulenko)
Solution:   Make 'autoselect' work for the + register. (Christian Brabant)
            Add the "autoselectplus" option in 'clipboard' and the "P" flag in
            'guioptions'.

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    597,
 /**/
     596,
 /**/