FOSS licensing clarification (in FLA) that dual-licensing is allowed

[silverhook]

After confirming with several original authors of the FLA, it seems the FLA was intended to require (through what is currently §4. License obligations by Us) the fiduciary/trustee to release the contributed code (also) as FOSS, allowing for dual-licensing even with a proprietary license.

The way that section is written though, it reads as if it requires the contributed code to only be released as FOSS. This does not seem to be what was originally intended.

I propose to change the wording to match what it seems many of us dealing with the FLA for years understood was the case.

What absolutely needs to stay is a hard requirement that any code that is released needs to be released as FOSS as well. E.g. if a contribution was included in a proprietary version, it needs to be included in a FOSS version too.