patch 8.0.1297: +autoservername does not show enabled on MS-Windows

Problem:    +autoservername does not show enabled on MS-Windows.
Solution:   Always define the flag on MS-Windows. (Ken Takata)

src/feature.h

@@ -1172,7 +1172,13 @@
  *			when --servername is not passed on the command line.
  */
 #if defined(FEAT_CLIENTSERVER) && !defined(FEAT_AUTOSERVERNAME)
+# ifdef WIN3264
+    /* Always enabled on MS-Windows. */
+#  define FEAT_AUTOSERVERNAME
+# else
+    /* Enable here if you don't use configure. */
 /* # define FEAT_AUTOSERVERNAME */
+# endif
 #endif
 
 /*

src/version.c

@@ -766,6 +766,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1297,
 /**/
     1296,
 /**/