a couple of fixes for byte ranges:

. use %qx format instead of %llx for 64-bit integer (apr_time_t);
  %llx prints as "%llx"
. pass offset and length to ap_bucket_create_mmap() so that byte
  ranges work with mmaps (at least for a single range)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86777 13f79535-47bb-0310-9956-ffa450edef68