[client] Block binding of the escape key

Id's binding of escape to togglemenu interfered with the hard-coding
(want escape to togglemenu (or console as a fallback) no matter what).
This idea was part of mercury's original design, too.

libs/client/cl_input.c

@@ -30,6 +30,14 @@
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
+
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
+
 #include "QF/cmd.h"
 #include "QF/cvar.h"
 #include "QF/dstring.h"
@@ -63,6 +71,10 @@ cl_bind_f (void)
 		return;
 	}
 
+	if (strcasecmp (Cmd_Argv (1), "ESCAPE") == 0) {
+		return;
+	}
+
 	if (!(key = OK_TranslateKeyName (Cmd_Argv (1)))) {
 		return;
 	}

libs/client/old_keys.c

@@ -59,7 +59,7 @@ typedef struct {
 } old_keyname_t;
 
 old_keyname_t   old_keynames[] = {
-	{"ESCAPE",			"key button 0x01"},
+	//{"ESCAPE",		"key button 0x01"}, binding not allowed
 	{"1",				"key button 0x02"},
 	{"2",				"key button 0x03"},
 	{"3",				"key button 0x04"},