Revert "do not pass historical author data to read only users"

This reverts commit b32aaaeb1b.

src/node/handler/PadMessageHandler.js

@@ -1016,10 +1016,6 @@ function handleClientReady(client, message)
         // Warning: never ever send padIds.padId to the client. If the
         // client is read only you would open a security hole 1 swedish
         // mile wide...
-        // Heh, turns out we already did when we sent historicalAuthorData so
-        // if it's a readonly pad request don't send the pad IDs of the author
-        if(sessioninfos[client.id].readonly) historicalAuthorData = {};
-
         var clientVars = {
           "accountPrivs": {
               "maxRevisions": 100