[feature/sqlite3] Add support for SQLite 3

Minimum version requirement is 3.6.15 as that's what ships with PHP 5.3.0
when support for SQLite 3 was added.

PHPBB3-9728

phpBB/includes/acp/acp_profile.php

@@ -114,6 +114,7 @@ class acp_profile
 					switch ($db->sql_layer)
 					{
 						case 'sqlite':
+						case 'sqlite3':
 							$sql = "SELECT sql
 								FROM sqlite_master
 								WHERE type = 'table'
@@ -1204,7 +1205,8 @@ class acp_profile
 			break;
 
 			case 'sqlite':
-				if (version_compare(sqlite_libversion(), '3.0') == -1)
+			case 'sqlite3':
+				if (version_compare($db->sql_server_info(true), '3.0') == -1)
 				{
 					$sql = "SELECT sql
 						FROM sqlite_master