PDO refactoring for code simplification (#2522)

* PDO refactor

* Automatic prefix when using the syntax `_tableName`
* Uniformity: MySQL is now PDO::ATTR_EMULATE_PREPARES = false just like SQLite and PostgreSQL, with consequences such as only one statement per query
* Use PDO methods exec(), query(), prepare() + execute() in a more efficient way
* Remove auto-update SQL code for versions older than FreshRSS 1.5 (3 years old)
* The name of the default category is set in PHP instead of in the DB (simplies SQL and allows changing the name according to the FreshRSS language)
* Rename `->bd` to `->pdo` (less of a frenshism, and more informative)
* Fix some requests, which were not compatible with MySQL prepared statements

* Whitespace

* Fix syntax for PostgreSQL sequences

+ MySQL install

* Minor formatting

* Fix lastInsertId for PostgreSQL

* Use PHP 5.6+ const

Take advantage of https://github.com/FreshRSS/FreshRSS/pull/2527
https://www.php.net/manual/en/migration56.new-features.php

* A bit of forgotten PHP 5.6 simplification for cURL

* Forgotten $s

* Mini fix custom user config

https://github.com/FreshRSS/FreshRSS/pull/2490/files#r326290346

* More work on install.php but not finished

* install.php working

* More cleaning of PDO in install

* Even more simplification

Take advantage of PDO->exec() to run multiple statements

* Disallow changing the name of the default category

https://github.com/FreshRSS/FreshRSS/pull/2522#discussion_r326967724

1 files changed, 2 insertions, 2 deletions

diff --git a/p/api/fever.php b/p/api/fever.php
index b81646928..30b85dafd 100644
--- a/p/api/fever.php
+++ b/p/api/fever.php
@@ -95,7 +95,7 @@ class FeverDAO extends Minz_ModelPdo
 		$sql = 'SELECT id, guid, title, author, '
 			. ($entryDAO->isCompressed() ? 'UNCOMPRESS(content_bin) AS content' : 'content')
 			. ', link, date, is_read, is_favorite, id_feed '
-			. 'FROM `' . $this->prefix . 'entry` WHERE';
+			. 'FROM `_entry` WHERE';
 
 		if (!empty($entry_ids)) {
 			$bindEntryIds = $this->bindParamArray('id', $entry_ids, $values);
@@ -120,7 +120,7 @@ class FeverDAO extends Minz_ModelPdo
 		$sql .= $order;
 		$sql .= ' LIMIT 50';
 
-		$stm = $this->bd->prepare($sql);
+		$stm = $this->pdo->prepare($sql);
 		$stm->execute($values);
 		$result = $stm->fetchAll(PDO::FETCH_ASSOC);