Several more warnings ... (#5340)

* Some more warnings removed

* Even more warnings ...

* Will it ever end? ;-)

* Avoid warning in dbstructure

* Origin and OStatus ...

* There are more warnings solved ... yeah!

* And again ...

* We are not done yet

* And more ...

* And some new places ...

* And more in the feeds

* Avoid some more

* And some backend stuff

* Notifications cleared

* Some more stuff

* and again ...

* It's getting fewer ...

* Some warnings had been hidden in the notifications

* Fix the fix

* And another missing one ...

* We need the owner here, not the user

* Forgotten user

* And more ...

* And some more warnings disappeared ...

* Some more frontend warnings

* Some backend warnings removed

* Fixed sidebar for "vier"

* And more ...

* Some more ...

* And something for "remote self"

* Am I stuck in an endless loop?

* Fix: Clear tag and file field on update

* Preset page content

mod/network.php

@@ -833,7 +833,7 @@ function networkThreadedView(App $a, $update, $parent)
 			$top_limit = DateTimeFormat::utcNow();
 		}
 
-		$items = dba::p("SELECT `item`.`parent-uri` AS `uri`, 0 AS `item_id`, `item`.$ordering AS `order_date` FROM `item`
+		$items = dba::p("SELECT `item`.`parent-uri` AS `uri`, 0 AS `item_id`, `item`.$ordering AS `order_date`, `author`.`url` AS `author-link` FROM `item`
 			STRAIGHT_JOIN (SELECT `oid` FROM `term` WHERE `term` IN
 				(SELECT SUBSTR(`term`, 2) FROM `search` WHERE `uid` = ? AND `term` LIKE '#%') AND `otype` = ? AND `type` = ? AND `uid` = 0) AS `term`
 			ON `item`.`id` = `term`.`oid`