Black tourist trails (common in Poland) not shown

Hi, color = black, osmc:symbol = black:white:black_bar are not shown in black. These black trails are often used in Poland as connecting trails (similar to yellow KČT trails). 

Check e. g. relation id 1 594 840 or 1 474 128 around Sarnia Skala: 
http://alpha.map1.eu/#zoom=15&lat=49.26493&lon=19.9379&layers=BTT
