Verkeerde beschrijving onderbord M11

[Vakonof]

De huidige beschrijving van onderbord M11 "Only applies to link road" klopt niet.

[Vakonof]

De beschrijving van zijn tegenhanger M17 ontbreekt volledig.

[joostschouppe]

I used this link to collect traffic sign descriptions: https://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium/Road_signs_plugin
Apparently, that is outdated, and I should use https://josm.openstreetmap.de/browser/osm/applications/editors/josm/plugins/roadsigns/data/roadsignpresetBE.xml
So check at the last link if descriptions are correct there. Later, I will try to automate using the info from there, see #1