Revert all SASL authzid (new feature) commits

- Revert all commits related to the SASL authzid feature since the next
  release will be a patch release, 7.65.1.

Prior to this change CURLOPT_SASL_AUTHZID  / --sasl-authzid was destined
for the next release, assuming it would be a feature release 7.66.0.
However instead the next release will be a patch release, 7.65.1 and
will not contain any new features.

After the patch release after the reverted commits can be restored by
using cherry-pick:

git cherry-pick a14d72c a9499ff 8c1cc36 c2a8d52 0edf690

Details for all reverted commits:

Revert "os400: take care of CURLOPT_SASL_AUTHZID in curl_easy_setopt_ccsid()."

This reverts commit 0edf6907ae37e2020722e6f61229d8ec64095b0a.

Revert "tests: Fix the line endings for the SASL alt-auth tests"

This reverts commit c2a8d52a1356a722ff9f4aeb983cd4eaf80ef221.

Revert "examples: Added SASL PLAIN authorisation identity (authzid) examples"

This reverts commit 8c1cc369d0c7163c6dcc91fd38edfea1f509ae75.

Revert "curl: --sasl-authzid added to support CURLOPT_SASL_AUTHZID from the tool"

This reverts commit a9499ff136d89987af885e2d7dff0a066a3e5817.

Revert "sasl: Implement SASL authorisation identity via CURLOPT_SASL_AUTHZID"

This reverts commit a14d72ca2fec5d4eb5a043936e4f7ce08015c177.

2 files changed, 0 insertions, 65 deletions

diff --git a/docs/libcurl/opts/CURLOPT_SASL_AUTHZID.3 b/docs/libcurl/opts/CURLOPT_SASL_AUTHZID.3
deleted file mode 100644
index 79b360b5e..000000000
--- a/docs/libcurl/opts/CURLOPT_SASL_AUTHZID.3
+++ /dev/null
@@ -1,64 +0,0 @@
-.\" **************************************************************************
-.\" *                                  _   _ ____  _
-.\" *  Project                     ___| | | |  _ \| |
-.\" *                             / __| | | | |_) | |
-.\" *                            | (__| |_| |  _ <| |___
-.\" *                             \___|\___/|_| \_\_____|
-.\" *
-.\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
-.\" *
-.\" * This software is licensed as described in the file COPYING, which
-.\" * you should have received as part of this distribution. The terms
-.\" * are also available at https://curl.haxx.se/docs/copyright.html.
-.\" *
-.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
-.\" * copies of the Software, and permit persons to whom the Software is
-.\" * furnished to do so, under the terms of the COPYING file.
-.\" *
-.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
-.\" * KIND, either express or implied.
-.\" *
-.\" **************************************************************************
-.\"
-.TH CURLOPT_SASL_AUTHZID 3 "17 July 2019" "libcurl 7.66.0" "curl_easy_setopt options"
-.SH NAME
-CURLOPT_SASL_AUTHZID \- authorisation identity (identity to act as)
-.SH SYNOPSIS
-#include <curl/curl.h>
-
-CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SASL_AUTHZID, char *authzid);
-.SH DESCRIPTION
-Pass a char * as parameter, which should be pointing to the zero terminated
-authorisation identity (authzid) for the transfer. Only applicable to the PLAIN
-SASL authentication mechanism where it is optional.
-
-When not specified only the authentication identity (authcid) as specified by
-the username will be sent to the server, along with the password. The server
-will derive a authzid from the authcid when not provided, which it will then
-uses internally.
-
-When the authzid is specified, the use of which is server dependent, it can be
-used to access another user's inbox, that the user has been granted access to,
-or a shared mailbox for example.
-.SH DEFAULT
-blank
-.SH PROTOCOLS
-IMAP, POP3 and SMTP
-.SH EXAMPLE
-.nf
-CURL *curl = curl_easy_init();
-if(curl) {
-  curl_easy_setopt(curl, CURLOPT_URL, "imap://example.com/");
-  curl_easy_setopt(curl, CURLOPT_USERNAME, "Kurt");
-  curl_easy_setopt(curl, CURLOPT_PASSWORD, "xipj3plmq");
-  curl_easy_setopt(curl, CURLOPT_SASL_AUTHZID, "Ursel");
-  ret = curl_easy_perform(curl);
-  curl_easy_cleanup(curl);
-}
-.fi
-.SH AVAILABILITY
-Added in 7.66.0
-.SH RETURN VALUE
-Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
-.SH "SEE ALSO"
-.BR CURLOPT_USERNAME "(3), " CURLOPT_PASSWORD "(3), ".BR CURLOPT_USERPWD "(3)"
diff --git a/docs/libcurl/opts/Makefile.inc b/docs/libcurl/opts/Makefile.inc
index 9a1016c3f..c8e15a5ed 100644
--- a/docs/libcurl/opts/Makefile.inc
+++ b/docs/libcurl/opts/Makefile.inc
@@ -272,7 +272,6 @@ man_MANS =                                      \
   CURLOPT_RTSP_SESSION_ID.3                     \
   CURLOPT_RTSP_STREAM_URI.3                     \
   CURLOPT_RTSP_TRANSPORT.3                      \
-  CURLOPT_SASL_AUTHZID.3                        \
   CURLOPT_SASL_IR.3                             \
   CURLOPT_SEEKDATA.3                            \
   CURLOPT_SEEKFUNCTION.3                        \