ENH: Recognize more color terminals.

- Patch from Matthew McCormick, slightly tweaked
  - See issue #6833

Source/kwsys/Terminal.c

@@ -141,20 +141,38 @@ static const char* kwsysTerminalVT100Names[] =
   "con80x43",
   "con80x50",
   "con80x60",
+  "cons25",
   "console",
   "cygwin",
+  "dtterm",
+  "eterm-color",
+  "gnome",
+  "gnome-256color",
   "konsole",
   "konsole-256color",
+  "kterm",
   "linux",
   "msys",
+  "linux-c",
+  "mach-color",
+  "mlterm",
+  "putty",
   "rxvt",
+  "rxvt-cygwin",
+  "rxvt-cygwin-native",
   "rxvt-unicode",
   "screen",
   "screen-256color",
+  "screen-bce",
+  "screen-w",
+  "screen.linux",
   "vt100",
   "xterm",
-  "xterm-color",
+  "xterm-16color",
   "xterm-256color",
+  "xterm-88color",
+  "xterm-color",
+  "xterm-debian",
   0
 };