Merge remote-tracking branch 'upstream/develop' into ticket/11015

* upstream/develop: (666 commits)
  [ticket/11077] Remove code from old global announcements system
  [ticket/11189] Replace DEBUG_EXTRA with DEBUG
  [ticket/11189] Always log critical errors when in cron or in image output
  [ticket/11187] Added a blank array to fix errors in functional tests
  [ticket/10780] Make L_COLON available in the installer.
  [ticket/11183] Remove $load_extensions and weird dl() calls
  [ticket/10970] Added extra documentation to parse_dynamic_path.
  [ticket/10939] Added documentation for phpbb_request::file
  [ticket/10865] Use code tags for install/database_update.php.
  [ticket/10865] Should have been a slash.
  [ticket/10780] Use L_COLON on LDAP page.
  [ticket/10780] Use L_COLON on search backend ACP pages.
  [ticket/10780] Use L_COLON for "download all attachments".
  [ticket/10780] Use colon from language in ucp_pm_compose.php where possible.
  [ticket/10780] Replace colons in phpBB/adm/style/acp_ext_details.html.
  [ticket/10780] Replace colon usage in adm template output with {L_COLON}
  [ticket/10780] Replace colon usage in template output with {L_COLON}
  [ticket/11181] Bump PHP requirement to 5.3.3 (from 5.3.2) [develop-olympus]
  [ticket/11181] Bump PHP requirement to 5.3.3 (from 5.3.2)
  [ticket/10172] Show prosilver birthday list even if there are no birthdays.
  ...

Conflicts:
	phpBB/common.php
	phpBB/download/file.php
	phpBB/includes/db/dbal.php
	phpBB/includes/db/firebird.php
	phpBB/includes/db/mssql.php
	phpBB/includes/db/mssql_odbc.php
	phpBB/includes/db/mssqlnative.php
	phpBB/includes/db/mysql.php
	phpBB/includes/db/mysqli.php
	phpBB/includes/db/oracle.php
	phpBB/includes/db/postgres.php
	phpBB/includes/db/sqlite.php
	phpBB/includes/extension/manager.php
	phpBB/install/database_update.php

phpBB/includes/cache/driver/file.php

@@ -385,6 +385,8 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 		{
 			$query_result = $query_id;
 		}
+
+		return $query_id;
 	}
 
 	/**

phpBB/includes/cache/driver/memory.php

@@ -19,7 +19,7 @@ if (!defined('IN_PHPBB'))
 * ACM Abstract Memory Class
 * @package acm
 */
-class phpbb_cache_driver_memory extends phpbb_cache_driver_base
+abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 {
 	var $key_prefix;
 
@@ -335,6 +335,8 @@ class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 		$this->_write('sql_' . $hash, $this->sql_rowset[$query_id], $ttl);
 
 		$query_result = $query_id;
+
+		return $query_id;
 	}
 
 	/**