Drop old Basic Authenticatio docs

The wiki these days contains a more detailed and correct description of
how Basic auth helpers work in Squid. This old document does not even
describe how the code works, so is no longer useful.

diff --git a/doc/Programming-Guide/BasicAuthentication.dox b/doc/Programming-Guide/BasicAuthentication.dox
deleted file mode 100644 (file)
index 1e24e1f..0000000
--- a/doc/Programming-Guide/BasicAuthentication.dox
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright (C) 1996-2016 The Squid Software Foundation and contributors
- *
- * Squid software is distributed under GPLv2+ license and includes
- * contributions from numerous individuals and organizations.
- * Please see the COPYING and CONTRIBUTORS files for details.
- */
-
-/**
-\defgroup AuthAPIBasic Basic Authentication
-\ingroup AuthAPI
-
-\par
-Basic authentication provides a username and password.  These
-are written to the authentication module processes on a single
-line, separated by a space:
-\code
-<USERNAME> <PASSWORD>
-\endcode
-
-\par
-       The authentication module process reads username, password pairs
-       on stdin and returns either "OK" or "ERR" on stdout for
-       each input line.
-
-\par
-       The following simple perl script demonstrates how the
-       authentication module works.  This script allows any
-       user named "Dirk" (without checking the password)
-       and allows any user that uses the password "Sekrit":
-
-\code
-#!/usr/bin/perl -w
-$|=1;          # no buffering, important!
-while (<>) {
-        chop;
-        ($u,$p) = split;
-        $ans = &amp;check($u,$p);
-        print "$ans\n";
-}
-
-sub check {
-        local($u,$p) = @_;
-        return 'ERR' unless (defined $p &amp;&amp; defined $u);
-        return 'OK' if ('Dirk' eq $u);
-        return 'OK' if ('Sekrit' eq $p);
-        return 'ERR';
-}
-\endcode
-
- */