Remove "using namespace std" from compiler header files and fix the fallout.

parse_misc.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998-2014 Stephen Williams ([email protected])
+ * Copyright (c) 1998-2021 Stephen Williams ([email protected])
  *
  *    This source code is free software; you can redistribute it
  *    and/or modify it in source code form under the terms of the GNU
@@ -24,6 +24,8 @@
 # include  <cstdio>
 # include  <iostream>
 
+using namespace std;
+
 extern const char*vl_file;
 unsigned error_count = 0;
 unsigned warn_count = 0;
@@ -75,4 +77,3 @@ int VLwrap()
 {
       return -1;
 }
-