15881: Add "remove sso-provider" to upgrade notes.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@tomclegg.ca>

diff --git a/doc/admin/upgrading.html.textile.liquid b/doc/admin/upgrading.html.textile.liquid
index 23d71204385af2e8d7a7a9ae17514b7223bea9c8..070e58983a50fc01c8943d6d29aa46b3d0453361 100644 (file)
--- a/doc/admin/upgrading.html.textile.liquid
+++ b/doc/admin/upgrading.html.textile.liquid
@@ -38,7 +38,11 @@ h2(#master). development master (as of 2020-02-07)
 
 "Upgrading from 2.0.0":#v2_0_0
 
-None in current development master.
+h3. Removing sso-provider
+
+The SSO (single sign-on) component is deprecated and will not be supported in future releases. Existing configurations will continue to work in this release, but you should switch to one of the built-in authentication mechanisms as soon as possible. See "setting up web based login":{{site.baseurl}}/install/setup-login.html for details.
+
+After migrating your configuration, uninstall the @arvados-sso-provider@ package.
 
 h2(#v2_0_0). v2.0.0 (2020-02-07)