Clean up the base64 and SHA1 additions and make sure they are

represented in the ApacheCore.def, ApacheCoreOS2.def, and httpd.exp
files.

I am very unhappy with the implementation assumptions between
ap_validate_password and the various encoding routines, like the
length of an encoded password never being greater than 120 characters,
but I have no time to fix them right now.  Not to mention all the other
usages of magic numbers with no explanation.  Yuck.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83673 13f79535-47bb-0310-9956-ffa450edef68