doc: made clarification about ngx.exec() requested by Dayo Akanji.

README.markdown

@@ -4132,7 +4132,7 @@ ngx.exec('/some-location', 'a=3&b=5&c=6');
 ngx.exec('/some-location?a=3&b=5', 'c=6');
 ```
 
-Named locations are also supported, but query strings are ignored. For example,
+Named locations are also supported (but the second `args` argument is currently ignored). For example,
 
 ```nginx
 

doc/HttpLuaModule.wiki

@@ -3422,7 +3422,7 @@ Does an internal redirect to <code>uri</code> with <code>args</code>.
     ngx.exec('/some-location?a=3&b=5', 'c=6');
 </geshi>
 
-Named locations are also supported, but query strings are ignored. For example,
+Named locations are also supported (but the second <code>args</code> argument is currently ignored). For example,
 
 <geshi lang="nginx">
     location /foo {