User manual

61
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
 b)Youmustcauseanyworkthatyoudistributeorpublish,that
in whole or in part contains or is derived from the Program or
anypartthereof,tobelicensedasawholeatnochargetoall
third parties under the terms of this License.
c) If the modified program normally reads commands
interactivelywhenrun,youmustcauseit,whenstartedrunning
forsuchinteractiveuseinthemostordinaryway,toprintor
display an announcement including an appropriate copyright
noticeandanoticethatthereisnowarranty(orelse,saying
that you provide a warranty) and that users may redistribute
theprogramundertheseconditions,andtellingtheuserhow
to view a copy of this License. (Exception: if the Program itself is
interactivebutdoesnotnormallyprintsuchanannouncement,
your work based on the Program is not required to print an
announcement.)
These requirements apply to the modified work as a whole.
If identifiable sections of that work are not derived from the
Program,andcanbereasonablyconsideredindependentand
separateworksinthemselves,thenthisLicense,anditsterms,
do not apply to those sections when you distribute them as
separate works. But when you distribute the same sections
aspartofawholewhichisaworkbasedontheProgram,the
distributionofthewholemustbeonthetermsofthisLicense,
whose permissions for other licensees extend to the entire
whole,andthustoeachandeverypartregardlessofwhowrote
it.
 Thus,itisnottheintentofthissectiontoclaimrightsorcontest
yourrightstoworkwrittenentirelybyyou;rather,theintentis
to exercise the right to control the distribution of derivative or
collective works based on the Program.