Copyright assignment/disclaimer

[Kai Henningsen]

I thought I might try to get the paperwork done so I could actually try
contributing nontrivial stuff. (And no, I don't have specific changes in
mind right now. I just know myself: if it's not clear that such changes
won't run into legal problems, I won't even start on them.)

http://gcc.gnu.org/contribute.html points to
http://www.gnu.org/prep/maintain.html#SEC7 "for details", which vaguely
talks about assignments and disclaimers but doesn't give any details,
except that there are two general options.

Given the GFDL disaster, I certainly want to know exactly what the
options are before deciding on anything.

So could someone please send me (or point me to where I can find) the
relevant text that would have to get signed for the various options?
(Yes, I do mean the text that gets signed, not a form requesting the
text. Can't make decisions based on the forms.)