spring-mvc.xsd stale-if-error attribute documentation incorrect

[pthorson]

Affects: 5.2.0.M2, 5.1.x, 4.3.x, etc

The documentation for the stale-if-error attribute in spring-mvc.xsd appears to have been copied from the s-maxage attribute:

	<xsd:attribute name="stale-if-error" type="xsd:int" use="optional">
		<xsd:annotation>
			<xsd:documentation><![CDATA[
Adds a "s-maxage" directive in the Cache-Control header.
This directive has the same meaning as the "max-age" directive, except it only applies to shared caches.
				]]></xsd:documentation>
		</xsd:annotation>
	</xsd:attribute>