MRBS 1.12.2 等保2.0二级整改完整提交

包含：登录失败锁定、90天密码有效期、30分钟会话超时、
强制改密、登录审计日志、屏幕水印、企业背景图、
备案信息固定底部、favicon、JS空集合保护、
会话过期体验优化（403 JSON）、display_errors 关闭、
固定 key 根治 Integrity check failed 等全部改动

注意：config.inc.php/.htaccess/.user.ini 含敏感信息，
通过 .gitignore 排除，勿推送到公开仓库。

lib/chillerlan/QRCode/Data/Byte.php

@@ -0,0 +1,86 @@
+<?php
+/**
+ * Class Byte
+ *
+ * @created      25.11.2015
+ * @author       Smiley <smiley@chillerlan.net>
+ * @copyright    2015 Smiley
+ * @license      MIT
+ */
+
+namespace chillerlan\QRCode\Data;
+
+use chillerlan\QRCode\Common\{BitBuffer, Mode};
+use function chr;
+use function ord;
+
+/**
+ * 8-bit Byte mode, ISO-8859-1 or UTF-8
+ *
+ * ISO/IEC 18004:2000 Section 8.3.4
+ * ISO/IEC 18004:2000 Section 8.4.4
+ */
+final class Byte extends QRDataModeAbstract{
+
+	/**
+	 * @inheritDoc
+	 */
+	public const DATAMODE = Mode::BYTE;
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getLengthInBits():int{
+		return ($this->getCharCount() * 8);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public static function validateString(string $string):bool{
+		return $string !== '';
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function write(BitBuffer $bitBuffer, int $versionNumber):QRDataModeInterface{
+		$len = $this->getCharCount();
+
+		$bitBuffer
+			->put(self::DATAMODE, 4)
+			->put($len, $this::getLengthBits($versionNumber))
+		;
+
+		$i = 0;
+
+		while($i < $len){
+			$bitBuffer->put(ord($this->data[$i]), 8);
+			$i++;
+		}
+
+		return $this;
+	}
+
+	/**
+	 * @inheritDoc
+	 *
+	 * @throws \chillerlan\QRCode\Data\QRCodeDataException
+	 */
+	public static function decodeSegment(BitBuffer $bitBuffer, int $versionNumber):string{
+		$length = $bitBuffer->read(self::getLengthBits($versionNumber));
+
+		if($bitBuffer->available() < (8 * $length)){
+			throw new QRCodeDataException('not enough bits available'); // @codeCoverageIgnore
+		}
+
+		$readBytes = '';
+
+		for($i = 0; $i < $length; $i++){
+			$readBytes .= chr($bitBuffer->read(8));
+		}
+
+		return $readBytes;
+	}
+
+}