patch 8.0.1531: cannot use 24 bit colors in MS-Windows console

Problem:    Cannot use 24 bit colors in MS-Windows console.
Solution:   Add support for vcon. (Nobuhiro Takasaki, Ken Takasaki,
            fixes #1270, fixes #2060)
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 1fad78a..5b684bd 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -851,7 +851,7 @@
 #ifdef FEAT_TERMINAL
     {"term_dumpdiff",	2, 3, f_term_dumpdiff},
     {"term_dumpload",	1, 2, f_term_dumpload},
-    {"term_dumpwrite",	2, 4, f_term_dumpwrite},
+    {"term_dumpwrite",	2, 3, f_term_dumpwrite},
     {"term_getaltscreen", 1, 1, f_term_getaltscreen},
     {"term_getattr",	2, 2, f_term_getattr},
     {"term_getcursor",	1, 1, f_term_getcursor},
@@ -6323,9 +6323,9 @@
 	else if (STRICMP(name, "syntax_items") == 0)
 	    n = syntax_present(curwin);
 #endif
-#if defined(WIN3264)
-	else if (STRICMP(name, "win95") == 0)
-	    n = FALSE;		/* Win9x is no more supported. */
+#ifdef FEAT_VTP
+	else if (STRICMP(name, "vcon") == 0)
+	    n = has_vtp_working();
 #endif
 #ifdef FEAT_NETBEANS_INTG
 	else if (STRICMP(name, "netbeans_enabled") == 0)