[phobos] Tango and the new time lib

[Walter Bright]

One of the Tango developers called me today. There are 5 developers of 
the Tango time library, and they feel that the Phobos time lib 
submission is close enough to theirs to be considered an infringement on 
their license. The Tango license is the BSD license, which does not 
permit others changing the license, such as to Boost which is the Phobos 
license.

I am not qualified to compare the two source code bases and make a legal 
determination if there is infringement or not. And quite frankly, I 
don't want to split legal hairs about it against the Tango developers' 
wishes. I've invited the Tango devs to subscribe to this mailing list, 
and I hope we can come to a resolution:

1. I think the best solution would be for Tango to relicense the time 
module under the Boost license, which would require the agreement of the 
five time module developers. Then, the Phobos version would include them 
as authors and they'd share in the copyright.

2. Next would be if the Tango developers who do agree to the Boost 
license would identify their contributions, those would get authorship & 
copyright credit, etc. Tango developers who do not agree would identify 
code they consider infringing, and that code would be removed from the 
Phobos version, and possibly reimplemented by someone who has not looked 
at the Tango version.


The bottom line is the Tango devs should get the final say on what is 
infringing and what isn't, and we won't relicense infringing code into 
Phobos without their explicit permission.