Clarify what NoRewindIterator does

NoRewindIterator does not forbid rewinds, it ignores them.

Patch by nikic.

Closes GH-2.

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@347593 c90b9560-bf6c-de11-be94-00142212c4b1

Author: nikic

reference/spl/norewinditerator.xml

@@ -10,7 +10,7 @@
   <section xml:id="norewinditerator.intro">
    &reftitle.intro;
    <para>
-    This iterator cannot be rewound.
+    This iterator ignores rewind operations. This allows processing an iterator in multiple partial foreach loops.
    </para>
   </section>
 <!-- }}} -->