patch 8.0.1577: virtual replace test fails on MS-Windows

Problem:    Virtual replace test fails on MS-Windows.
Solution:   Make adding a termcap entry work for a builtin terminal.
            Restore terminal keys in a better way.

src/version.c

@@ -766,6 +766,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1577,
 /**/
     1576,
 /**/