updated window_procs

Add a non-string identifier to window_procs for use in runtime
identification of the current window port being used.

Use a macro WPID to add the identification at the top of the
various existing window_procs declarations. It expands to the
existing text string, as well as the newly added field wp_id
with a wp_ identifier.

For example, WPID(tty) expands to: "tty", wp_tty

The generated wp_tty must be present in the wp_ids enum at
the top of include/winprocs.h.

The WINDOWPORT(x) macro has been updated to expand to a simple
value comparison (port.wp_id == wp_x), instead of a
string comparison.

sys/windows/windmain.c

@@ -893,7 +893,7 @@ safe_routines(void)
      * Get a set of valid safe windowport function
      * pointers during early startup initialization.
      */
-    if (!WINDOWPORT(safe-startup))
+    if (!WINDOWPORT(safestartup))
         windowprocs = *get_safe_procs(1);
     if (!GUILaunched)
         windowprocs.win_nhgetch = windows_console_custom_nhgetch;
@@ -1316,7 +1316,7 @@ tty_self_recover_prompt(void)
     c = 'n';
     ct = 0;
     saved_procs = windowprocs;
-    if (!WINDOWPORT(safe-startup))
+    if (!WINDOWPORT(safestartup))
         windowprocs = *get_safe_procs(2); /* arg 2 uses no-newline variant */
     windowprocs.win_nhgetch = windows_console_custom_nhgetch;
     raw_print("\n");