PolarSSL: deprecate support step 1. Removed from configure.

Also removed mentions from most docs.

Discussed: https://curl.haxx.se/mail/lib-2019-05/0045.html

Closes #3888

6 files changed, 39 insertions, 21 deletions

diff --git a/docs/DEPRECATE.md b/docs/DEPRECATE.md
index 4f2570ade..94a5c6256 100644
--- a/docs/DEPRECATE.md
+++ b/docs/DEPRECATE.md
@@ -19,3 +19,32 @@ version. The default remains supported for now.
 
 The support for HTTP/0.9 will be switched to disabled by default in 6 months,
 in the September 2019 release (possibly called curl 7.68.0).
+
+## PolarSSL
+
+The polarssl TLS library has not had an update in over three years. The last
+release was done on [January 7
+2016](https://tls.mbed.org/tech-updates/releases). This library has been
+superceded by the mbedTLS library, which is the current incarnation of
+PolarSSL. curl has supported mbedTLS since 2015.
+
+It seems unlikely that this library is a good choice for users to get proper
+TLS security and support today and at the same time there are plenty of good
+and updated alternatives.
+
+I consider it likely that the existing users of curl + polarssl out there are
+stuck on old curl versions and when they eventually manage to update curl they
+should also be able to update their TLS library.
+
+### State
+
+In the curl 7.66.0 release (July 17, 2019) the ability to build with this TLS
+backend is removed from the configure script. The code remains and can be
+built and used going forward, but it has to be manually enabled in a build (or
+the configure removal reverted).
+
+### Removal
+
+The support for PolarSSL and all code for it will be completely removed from
+the curl code base six months after it ships disabled in configure in a
+release. In the release on or near February 27, 2020. (Named 7.70.0?)
diff --git a/docs/cmdline-opts/pinnedpubkey.d b/docs/cmdline-opts/pinnedpubkey.d
index 0657e6e79..b1c7bdef6 100644
--- a/docs/cmdline-opts/pinnedpubkey.d
+++ b/docs/cmdline-opts/pinnedpubkey.d
@@ -17,11 +17,9 @@ PEM/DER support:
   7.39.0: OpenSSL, GnuTLS and GSKit
   7.43.0: NSS and wolfSSL/CyaSSL
   7.47.0: mbedtls
-  7.49.0: PolarSSL
 sha256 support:
   7.44.0: OpenSSL, GnuTLS, NSS and wolfSSL/CyaSSL.
   7.47.0: mbedtls
-  7.49.0: PolarSSL
 Other SSL backends not supported.
 
 If this option is used several times, the last one will be used.
diff --git a/docs/libcurl/libcurl-thread.3 b/docs/libcurl/libcurl-thread.3
index 1692b0fda..ae1e387be 100644
--- a/docs/libcurl/libcurl-thread.3
+++ b/docs/libcurl/libcurl-thread.3
@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 2015 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 2015 - 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
@@ -56,10 +56,6 @@ https://curl.haxx.se/libcurl/c/opensslthreadlock.html
 https://gnutls.org/manual/html_node/Thread-safety.html
 .IP NSS
 thread-safe already without anything required.
-.IP PolarSSL
-Required actions unknown.
-.IP yassl
-Required actions unknown.
 .IP Secure-Transport
 The engine is used by libcurl in a way that is fully thread-safe.
 .IP WinSSL
diff --git a/docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.3 b/docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.3
index 8f61f89a6..987a24357 100644
--- a/docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.3
+++ b/docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.3
@@ -99,13 +99,11 @@ PEM/DER support:
 
   7.39.0-7.48.0,7.58.1+: GSKit
 
-  7.43.0: NSS and wolfSSL/CyaSSL
+  7.43.0: NSS and wolfSSL
 
   7.47.0: mbedtls
 
-  7.49.0: PolarSSL
-
-  7.54.1: SecureTransport/DarwinSSL on macOS 10.7+/iOS 10+
+  7.54.1: SecureTransport on macOS 10.7+/iOS 10+
 
   7.58.1: SChannel
 
@@ -115,9 +113,7 @@ sha256 support:
 
   7.47.0: mbedtls
 
-  7.49.0: PolarSSL
-
-  7.54.1: SecureTransport/DarwinSSL on macOS 10.7+/iOS 10+
+  7.54.1: SecureTransport on macOS 10.7+/iOS 10+
 
   7.58.1: SChannel Windows XP SP3+
 
diff --git a/docs/libcurl/opts/CURLOPT_PROXY_CAPATH.3 b/docs/libcurl/opts/CURLOPT_PROXY_CAPATH.3
index 43bccd7bc..e679409c9 100644
--- a/docs/libcurl/opts/CURLOPT_PROXY_CAPATH.3
+++ b/docs/libcurl/opts/CURLOPT_PROXY_CAPATH.3
@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * 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
@@ -55,9 +55,8 @@ if(curl) {
 .SH AVAILABILITY
 Added in 7.52.0
 
-This option is supported by the OpenSSL, GnuTLS, PolarSSL and mbedTLS
-(since 7.56.0) backends. The NSS backend provides the option only for
-backward compatibility.
+This option is supported by the OpenSSL, GnuTLS, and mbedTLS (since 7.56.0)
+backends. The NSS backend provides the option only for backward compatibility.
 .SH RETURN VALUE
 CURLE_OK if supported; or an error such as:
 
diff --git a/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.3 b/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.3
index f6d56ebe9..fbfb1509e 100644
--- a/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.3
+++ b/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.3
@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * 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
@@ -94,11 +94,11 @@ footer:
 .SH AVAILABILITY
 PEM/DER support:
 
-  7.52.0: GSKit, GnuTLS, NSS, OpenSSL, PolarSSL, mbedtls, wolfSSL/CyaSSL
+  7.52.0: GSKit, GnuTLS, NSS, OpenSSL, mbedtls, wolfSSL
 
 sha256 support:
 
-  7.52.0: GnuTLS, NSS, OpenSSL, PolarSSL, mbedtls, wolfSSL/CyaSSL
+  7.52.0: GnuTLS, NSS, OpenSSL, mbedtls, wolfSSL
 
 Other SSL backends not supported.
 .SH RETURN VALUE