Fix GUC names using the old syntax

api.rst

@@ -2523,7 +2523,7 @@ As an example, let's add some cache headers for all requests that come from an I
 
    create or replace function custom_headers() returns void as $$
    declare
-     user_agent text := current_setting('request.header.user-agent', true);
+     user_agent text := current_setting('request.headers', true)::json->>'user-agent';
    begin
      if user_agent similar to '%MSIE (6.0|7.0)%' then
        perform set_config('response.headers',

auth.rst

@@ -95,7 +95,7 @@ SQL code can access claims through GUC variables set by PostgREST per request. F
 
 .. code:: sql
 
-  current_setting('request.jwt.claim.email', true)
+  current_setting('request.jwt.claims', true)::json->>'email';
 
 This allows JWT generation services to include extra information and your database code to react to it. For instance the RLS example could be modified to use this current_setting rather than current_user. The second 'true' argument tells current_setting to return NULL if the setting is missing from the current configuration.
 

tutorials/tut1.rst

@@ -212,7 +212,7 @@ First make a new schema and add the function:
     language plpgsql
     as $$
   begin
-    if current_setting('request.jwt.claim.email', true) =
+    if current_setting('request.jwt.claims', true)::json->>'email' =
        'disgruntled@mycompany.com' then
       raise insufficient_privilege
         using hint = 'Nope, we are on to you';