Merge r778942, r780648, r780655, r780692, r780697, r780699 from trunk:

mod_alias: Enforce sanity in args to Redirect
PR 44729


Fix error with arg counting


* Some custom defined response codes also do not require 3 arguments (all that
  are not redirects).


More adjustment for Redirect argument checking...


typo


Simplify... handle this below, even though it's
after some possible expensive regex

Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@792917 13f79535-47bb-0310-9956-ffa450edef68