How to add missing copyright and license headers to sources?

[mETz]

Heya,

since nobody replied to my mail on kde-licensing for one week I'm reposting 
this here so I can finally ditch/commit/edit my rather huge patch.
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I'm currently cleaning up Noatun sources (to be found in kdemultimedia/noatun) 
and ran into the problem that almost all files miss a license and/or 
copyright header. There's kdemultimedia/noatun/COPYING which states that 
everything should be under BSD license if not stated in the source file.

Now I have the following questions:

- Is it ok to add the BSD license text from 
http://developer.kde.org/policies/licensepolicy.html to all source files that 
lack a license header and remove the COPYING file (IIRC license files should 
not be scattered around kde svn and the ones in kdelibs should be referenced)

- Whom to add as copyright holders? I wasted my whole last night to find 
previous authors for a file including their full name and email and then I 
manually picked the ones that did major work on a file and added them with 
their respective commit timeframe. Later I was told on IRC that adding 
copyright for persons other than me without asking them is probably not a good 
idea

slighly less important:
- How safe is the BSD license if you're just coding for fun and don't want to 
get sued in case you run into a copyright or patent issue by pure accident 
(i.e. you didn't know before that you infrige a patent or read something that 
has a restrictive copyright)?

Bye, Stefan aka mETz
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