Suggestions by Justin, implemention by Will.  Rename away all bogisity,
  especially eliminating all of 'our' capitalized identifiers that were
  easily confused with library symbols; go with APR_STATUS_IS_EOF() just
  in case there is a platform result; fix a bogus *len = 0; reassignment
  and fold the two flavors of input context tracking into one.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97368 13f79535-47bb-0310-9956-ffa450edef68