RequestFactory: Fixed possible remoteAddr spoofing (issue #87)

Only one handler can be set via header_register_callback() and Response should not overwrite the previous.

This reverts commit 87796c0c.

Use better detection for started session

typo

RequestFactory: correctly detects scheme and port if the server is behind a trusted proxy [Closes #81][Closes #4]

This reverts commit 19ecb8cc.

Response: phpDoc fixes

Fix FileUpload::move($dest) when low permission to chmod