merged branch Tobion/patch-2 (PR #6166)

This PR was merged into the 2.0 branch.

Commits
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57edf56 removed wrong routing xsd statement `mixed="true"`

Discussion
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removed wrong routing xsd statement `mixed="true"`

mixed="true" means that the element could contain both text and other elements, e.g.
`<requirement key="_locale">text <subelement /></requirement>`
But this wrong and such a definition would not even validate against the scheme as the xsd does not define which elements would be expected inside.

src/Symfony/Component/Routing/Loader/schema/routing/routing-1.0.xsd

@@ -31,7 +31,7 @@
     <xsd:attribute name="prefix" type="xsd:string" />
   </xsd:complexType>
 
-  <xsd:complexType name="element" mixed="true">
+  <xsd:complexType name="element">
     <xsd:attribute name="key" type="xsd:string" />
   </xsd:complexType>
 </xsd:schema>