Fix #541 (deel 2: usernames met speciale tekens)
Fix #541 (deel 2: usernames met speciale tekens)

GeoffreyDijkstra/spotweb,the-darkvoid/spotweb,tswestendorp/spotweb,gijsroge/spotweb,mbirth/spotweb,mesa57/spotweb,Blauwbek/spotweb,isuftin/spotweb-1,mbirth/spotweb,Spotweb/Spotweb,Blauwbek/spotweb,gijsroge/spotweb,rodikal/Spotweb,riksmith/Spotweb,Spotweb/Spotweb,LeeThompson/spotweb,the-darkvoid/spotweb,riksmith/Spotweb,Blauwbek/spotweb,LeeThompson/spotweb,rodikal/Spotweb,mesa57/spotweb,tswestendorp/spotweb,GeoffreyDijkstra/spotweb,isuftin/spotweb-1