Fixed AR-1321: Allow '&' in filename

The following filename is valid now: "x ¬ £ % & + ; x.txt"
This was a restriction imposed by WebDAV, but the encoding of the repsonses is working well and these restrictions be removed as a result.

Fixed AR-1281: WebDAV upload was assigning incorrect encoding

I added a bean 'charset.finder', which can be fetched from the MimetypeService.
Various pluggins now exist to decode a stream and figure out what the encoding is.
WebDAV and CIFS/FTP are now hooked into this so that they guess a little better.

Fixed others:
Added retrying transactions to WebDAV.
Read/write transactions for WebDAV.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@6073 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

config/alfresco/core-services-context.xml

@@ -143,6 +143,21 @@
             <value>false</value>
         </property>
     </bean>
+    
+    <!-- Characterset decoder -->
+    <bean id="charset.finder" class="org.alfresco.repo.content.encoding.ContentCharsetFinder">
+      <property name="defaultCharset">
+         <value>UTF-8</value>
+      </property>
+      <property name="mimetypeService">
+         <ref bean="mimetypeService"/>
+      </property>
+      <property name="charactersetFinders">
+         <list>
+            <bean class="org.alfresco.encoding.GuessEncodingCharsetFinder" />
+         </list>
+      </property>
+    </bean>
 
     <!-- transaction service -->
     <alias name="transactionService" alias="transactionComponent"/>