Docs: correct ALTER USER MAPPING description to account for 9.2 change
</section>
<section id="section3">
<title>Description</title>
- <p><codeph>ALTER USER MAPPING</codeph> changes the definition of a user mapping for a
- foreign server. Only the owner of the server can change the user mappings of that server.</p>
+ <p><codeph>ALTER USER MAPPING</codeph> changes the definition of a user mapping for a foreign server.</p>
+ <p>The owner of a foreign server can alter user mappings for that server for any user. Also, a user granted <codeph>USAGE</codeph> privilege on the server can alter a user mapping for their own user name.</p>
</section>
<section id="section4">
<title>Parameters</title>
