GPL mit Exception

[cookie22]

hallo,

ich würde gerne mein shareware programm mit dem portable installer von PortableApps installieren. das ding kommt angeblich unter gpl, allerding steht dann dort folgendes:

Zitat:

;Copyright 2007-2009 John T. Haller of PortableApps.com
;Website: http://PortableApps.com/

;This software is OSI Certified Open Source Software.
;OSI Certified is a certification mark of the Open Source Initiative.

;This program is free software; you can redistribute it and/or
;modify it under the terms of the GNU General Public License
;as published by the Free Software Foundation; either version 2
;of the License, or (at your option) any later version.

;This program is distributed in the hope that it will be useful,
;but WITHOUT ANY WARRANTY; without even the implied warranty of
;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;GNU General Public License for more details.

;You should have received a copy of the GNU General Public License
;along with this program; if not, write to the Free Software
;Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

;EXCEPTION: The PortableApps.com Installer can be used with open source
;applications licensed under OSI-approved licenses as well as freeware provided
;it is unmodified and it adheres to the current PortableApps.com Format Specification
;as published at PortableApps.com/development. It may also be used with commercial
;software by contacting PortableApps.com.

jetzt meine frage. dürfen die diese exception einfach hinzufügen? eigentlich dachte ich das durch solche zusätze die gpl automatsch nicht mehr gültig ist, oder liege ich da falsch?

sogesehen ists auch nur ne modifiezierte version vom nsis, somit find ich das noch komischer.