Take a quick pass through the refactored authz code. No real big changes here.

* modules/aaa/mod_authz_host.c: Tweak locations of some comments; reflow
  long lines; correct and simplify (I think) ap_some_auth_required logic.
* modules/aaa/mod_auth.h: Remove AUTHZ_DECLINED for now; reflow long lines;
  improve comments; remove some no longer useful comments
* modules/aaa/mod_authz_user.c: Reflow long lines and remove unneeded variable.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/authz-dev@351902 13f79535-47bb-0310-9956-ffa450edef68