doc: fixed the code sample for ngx.redirect() to reflect recent changes there. thanks Zi Lin for the report.

Author: agentzh

README.markdown

@@ -4276,7 +4276,7 @@ which is equivalent to
 
 ```lua
 
- return ngx.redirect("http://localhost:1984/foo", ngx.HTTP_MOVED_TEMPORARILY)
+ return ngx.redirect("/foo", ngx.HTTP_MOVED_TEMPORARILY)
 ```
 
 Redirecting arbitrary external URLs is also supported, for example:

doc/HttpLuaModule.wiki

@@ -3557,7 +3557,7 @@ Here is an example assuming the current server name is <code>localhost</code> an
 which is equivalent to
 
 <geshi lang="lua">
-    return ngx.redirect("http://localhost:1984/foo", ngx.HTTP_MOVED_TEMPORARILY)
+    return ngx.redirect("/foo", ngx.HTTP_MOVED_TEMPORARILY)
 </geshi>
 
 Redirecting arbitrary external URLs is also supported, for example: