Alexandre,
I submitted four UTF-7 patches on October 19 and am still waiting for feedback. I was hoping that these patches would not be controversial because they only add encoding tests. I have six additional patches waiting in https://github.com/alexhenrie/wine/commits/master - four patches for adding decoding tests and two patches to make all the tests pass - but I will not submit them until I get feedback about the first four that I have already submitted.
-Alex