merge of 1708107,1709587,1709602,1709995,1710231,1710419,1710572,1710583 from...

merge of 1708107,1709587,1709602,1709995,1710231,1710419,1710572,1710583 from trunk, addition of master conn_rec*, minor bump of mmn

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.17-protocols-changes@1712567 13f79535-47bb-0310-9956-ffa450edef68