- Fix OIDC error "a.join is not a function" b reverting

configurable OAUTH2_ID_TOKEN_WHITELIST_FIELDS and
  OAUTH2_REQUEST_PERMISSIONS from Wekan v2.22-2.26.

Thanks to xet7 !

Closes #2206,
Related #1874,
Related #1722

server/authentication.js

@@ -76,8 +76,8 @@ Meteor.startup(() => {
             authorizationEndpoint: process.env.OAUTH2_AUTH_ENDPOINT,
             userinfoEndpoint: process.env.OAUTH2_USERINFO_ENDPOINT,
             tokenEndpoint: process.env.OAUTH2_TOKEN_ENDPOINT,
-            idTokenWhitelistFields: process.env.OAUTH2_ID_TOKEN_WHITELIST_FIELDS || [],
-            requestPermissions: process.env.OAUTH2_REQUEST_PERMISSIONS || ['openid', 'profile', 'email'],
+            idTokenWhitelistFields: [],
+            requestPermissions: ['openid'],
           },
         }
       );