Start working on backporting security debug to 2.x

- Add SecurityException
- Add AuthSecurityException

Refs #8449

lib/Cake/Error/exceptions.php

@@ -627,3 +627,78 @@ class NotImplementedException extends CakeException {
 //@codingStandardsIgnoreEnd
 
 }
+
+/**
+ * Security exception - used when SecurityComponent detects any issue with the current request
+ *
+ * @package       Cake.Error
+ */
+class SecurityException extends BadRequestException {
+
+/**
+ * Security Exception type
+ * @var string
+ */
+	protected $_type = 'secure';
+
+/**
+ * Reason for request blackhole
+ *
+ * @var string
+ */
+	protected $_reason = null;
+
+/**
+ * Getter for type
+ *
+ * @return string
+ */
+	public function getType() {
+		return $this->_type;
+	}
+
+/**
+ * Set Message
+ *
+ * @param string $message Exception message
+ * @return void
+ */
+	public function setMessage($message) {
+		$this->message = $message;
+	}
+
+/**
+ * Set Reason
+ *
+ * @param string|null $reason Reason details
+ * @return void
+ */
+	public function setReason($reason = null) {
+		$this->_reason = $reason;
+	}
+
+/**
+ * Get Reason
+ *
+ * @return string
+ */
+	public function getReason() {
+		return $this->_reason;
+	}
+
+}
+
+/**
+ * Auth Security exception - used when SecurityComponent detects any issue with the current request
+ *
+ * @package       Cake.Error
+ */
+class AuthSecurityException extends SecurityException {
+
+/**
+ * Security Exception type
+ * @var string
+ */
+	protected $_type = 'auth';
+
+}