Make lexical token STRING new based.

The STRING lexical token was malloc based, but then was passed
to routines that are expecting a new based result. This patch
standardizes on a new/delete based approach.

lexor.lex

@@ -168,12 +168,12 @@ S [afpnumkKMGT]
 <CSTRING>\\\\ { yymore(); /* Catch \\, which is a \ escaping itself */ }
 <CSTRING>\\\" { yymore(); /* Catch \", which is an escaped quote */ }
 <CSTRING>\n   { BEGIN(0);
-                yylval.text = strdup(yytext);
+                yylval.text = strdupnew(yytext);
 		VLerror(yylloc, "Missing close quote of string.");
 		yylloc.first_line += 1;
 		return STRING; }
 <CSTRING>\"   { BEGIN(0);
-                yylval.text = strdup(yytext);
+                yylval.text = strdupnew(yytext);
 		yylval.text[strlen(yytext)-1] = 0;
 		return STRING; }
 <CSTRING>.    { yymore(); }

parse.y

@@ -685,8 +685,8 @@ description
   | KK_attribute '(' IDENTIFIER ',' STRING ',' STRING ')'
       { perm_string tmp3 = lex_strings.make($3);
 	pform_set_type_attrib(tmp3, $5, $7);
-	delete[]$3;
-	delete $5;
+	delete[] $3;
+	delete[] $5;
       }
   ;
 
@@ -2301,8 +2301,8 @@ module_item
 		{ perm_string tmp3 = lex_strings.make($3);
 		  perm_string tmp5 = lex_strings.make($5);
 		  pform_set_attrib(tmp3, tmp5, $7);
-		  delete[]$3;
-		  delete $5;
+		  delete[] $3;
+		  delete[] $5;
 		}
 	| KK_attribute '(' error ')' ';'
 		{ yyerror(@1, "error: Malformed $attribute parameter list."); }

pform.cc

@@ -1696,7 +1696,7 @@ void pform_set_attrib(perm_string name, perm_string key, char*value)
 	    curg->attributes[key] = new PEString(value);
 
       } else {
-	    free(value);
+	    delete[] value;
 	    VLerror("Unable to match name for setting attribute.");
 
       }
@@ -1712,7 +1712,7 @@ void pform_set_type_attrib(perm_string name, const string&key,
       map<perm_string,PUdp*>::const_iterator udp = pform_primitives.find(name);
       if (udp == pform_primitives.end()) {
 	    VLerror("type name is not (yet) defined.");
-	    free(value);
+	    delete[] value;
 	    return;
       }