complete documentation and fix links

archiva-docs/src/site/apt/userguide/index.apt

@@ -38,7 +38,7 @@ Users Guide
 
     * {{{./rss.html}RSS Feeds in Archiva}}
     
-    * {{{./auditlog-report.html}Viewing the Audit Log Report}}
+    * {{{./querying-artifacts.html}Querying Artifacts}}
 
     []
 

archiva-docs/src/site/apt/userguide/querying-artifacts.apt

@@ -47,5 +47,8 @@ Querying Artifacts
 
   * r= the repository (optional, if none all repositories available for reading for the current user are searched)
 
+  []
 
+  <<NOTE>>: the response is a redirect (so you need to follow redirect if you want to download the artifact). No content
+  response is returned if the query doesn't match any artifact.