IMAP: Fixed stream vs. parse exception handling.

* Protocol::HandleNextResponse() will now exit when a stream exception
  occurs.
* This should fix bug #12601.

src/add-ons/mail_daemon/inbound_protocols/imap/imap_lib/Protocol.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2015, Haiku Inc. All Rights Reserved.
+ * Copyright 2010-2016, Haiku Inc. All Rights Reserved.
  * Copyright 2010 Clemens Zeidler. All rights reserved.
  *
  * Distributed under the terms of the MIT License.
@@ -355,6 +355,8 @@ Protocol::HandleResponse(Command* command, bigtime_t timeout,
 			}
 		} catch (ParseException& exception) {
 			printf("Error during parsing: %s\n", exception.Message());
+		} catch (StreamException& exception) {
+			return exception.Status();
 		}
 
 		if (fOngoingCommands.size() == 0)

src/add-ons/mail_daemon/inbound_protocols/imap/imap_lib/Response.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011-2013, Axel Dörfler, [email protected].
+ * Copyright 2011-2016, Axel Dörfler, [email protected].
  * Distributed under the terms of the MIT License.
  */
 
@@ -393,7 +393,7 @@ ParseException::ParseException(const char* format, ...)
 
 StreamException::StreamException(status_t status)
 	:
-	ParseException("Error from stream: %s", status)
+	fStatus(status)
 {
 }
 

src/add-ons/mail_daemon/inbound_protocols/imap/imap_lib/Response.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011-2013, Axel Dörfler, [email protected].
+ * Copyright 2011-2016, Axel Dörfler, [email protected].
  * Distributed under the terms of the MIT License.
  */
 #ifndef RESPONSE_H
@@ -107,9 +107,14 @@ protected:
 };
 
 
-class StreamException : public ParseException {
+class StreamException : public std::exception {
 public:
 								StreamException(status_t status);
+
+			status_t			Status() const { return fStatus; }
+
+private:
+			status_t			fStatus;
 };