[Savannah-hackers-public] Explanation about permissive licences?

[Mario Castelán Castro]

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February 5th 2010 for address@hidden copy to
address@hidden thread "Explanation about permissive
licences?".

The Revised BSD licence says "Redistributions of source code must
retain the above copyright notice, this list of conditions and the
following disclaimer." followed by the rest of conditions and the
disclamer.

If me or some other person modify a file under the revised BSD licence
can he licence the result under any other licence he chose (Including
propietary ones)?.

Where must I retain the original Copyright notice and the original BSD
licence notice?, After my licence and my copyright notice?, Or where
else?.

Is required I put an separator something like "The original file is
licenced as follows: [...]"?.

Do the same apply for the following licence or what are the
differences?:

"Permission is granted to any individual or institution to use, copy,
modify, and distribute this software, provided that this complete
copyright and permission notice is maintained, intact, in all copies
and supporting documentation. <THE COPYRIGHT HOLDER> provides this
software "as is" without express or implied warranty."

In both cases Won't the requirement to retain that notice qualify a
"futher restriction"?

Note: I assume the second quoted licence is a permissive free software
licence, if not please correct me.

Thanks in advance.
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