use value from registry

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1443755 13f79535-47bb-0310-9956-ffa450edef68
improve documentation

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1443756 13f79535-47bb-0310-9956-ffa450edef68
improve documentation

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1443758 13f79535-47bb-0310-9956-ffa450edef68
improve logging and no need to pack local index of remote repositories

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1443759 13f79535-47bb-0310-9956-ffa450edef68