Merge branch 'stable-2.11'

* stable-2.11:
  Update download-commands plugin revision
  Make sure /a is not in the project name for git-over-http requests
  Update plugin archetype version in plugin documentation to 2.11
  Avoid NPE in get related changes

* Update download-commands plugin revision:
  Include '/a' into HttpScheme URLs to trigger authentication

Change-Id: I3536900d131d01aad9144bdb9d452725ab06cc83
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

gerrit-httpd/src/main/java/com/google/gerrit/httpd/GitOverHttpServlet.java

@@ -91,7 +91,7 @@ public class GitOverHttpServlet extends GitServlet {
   public static final String URL_REGEX;
   static {
     StringBuilder url = new StringBuilder();
-    url.append("^(?:/p/|/)(.*/(?:info/refs");
+    url.append("^(?:/a)?(?:/p/|/)(.*/(?:info/refs");
     for (String name : GitSmartHttpTools.VALID_SERVICES) {
       url.append('|').append(name);
     }