How to add missing copyright and license headers to sources?

Moin,

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)

- 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 is probably not a good idea (read: wrong)

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

PS: Please CC me as I'm not subscribed to kde-licensing, thanks

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