Harald Welte hwelte@sysmocom.de HW sysmocom sysmocom - s.f.m.c. GmbH Managing Director 2016-2021 sysmocom - s.f.m.c. GmbH Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with the Invariant Sections being just 'Foreword', 'Acknowledgements' and 'Preface', with no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".