Done as changeset osm.org/changeset/144673508

Also it may be worth to say that I only updated the nodes that didn't have any info, and left the ones that already did as they were

Hi everyone,
Sorry for the late reply, only checked my emails now.
@silversurfer83 : Yes, I've read it, I can revert if necessary, and tried it on a smaller subset.
I know that i can't assume that all mcdonald's do have Wifi, that said :
- visually looking from https://www.mcdonalds.fr/restaurants, it seems that the vast majority does, I've found 3 in France over the 3000+ that are modified in the dump, I know that 1% error rate is described as not good enough, but 0.1% seemed OK to me
- As a user of Organic Maps, all locations are indicated as "without wifi" in the interface, making it false for the most part, plus if i do go in a location where wifi is not present, I can't manually set the information as "there is no wifi there" which would be useful (because it is by default assumed as not providing wifi)
Anyways, it seemed good enough for me, but if it doesn't convince you, i'd be happy to revert