Adds some comments

qutebrowser/config.py

@@ -23,9 +23,12 @@ config.bind(',m', 'spawn --detach mpv {url}')
 # ,M hints and oens choice with mpv
 config.bind(',M', 'hint links spawn --detach mpv {hint-url}')
 
+# Opens a url with zathura - this is only really useful if the url is a pdf
 config.bind(',z', 'hint links spawn --detach zathura {hint-url}')
 
+# Shows QR code for current page
 config.bind(',q', 'spawn --detach qrcode {url}')
+# Shows QR code for chosen link
 config.bind(',Q', 'hint links spawn --detach qrcode {hint-url}')
 
 # Position of the tab bar.