Undocumented m_img parameter

[AGSPhoenix]

I'm seeing an m_img parameter in threads. What is this?

Example thread: https://a.4cdn.org/k/thread/40218314.json

{"no":40218469,"now":"01\/07\/19(Mon)19:44:54","name":"Anonymous","com":"Look at my tactical shotgun<br><br><a href=\"#p40218314\" class=\"quotelink\">&gt;&gt;40218314<\/a><br>It depends","filename":"0586D749-EB4B-405F-B525-F7CF7B184C80","ext":".jpg","w":1936,"h":2592,"tn_w":93,"tn_h":125,"tim":1546908294712,"time":1546908294,"md5":"sWA3f9BnHTGl1vuQnveVpQ==","fsize":1323626,"resto":40218314,"m_img":1}

[bakugo]

4chan serves smaller copies of images (limited to 1024x1024) for mobile users. These images are in the same location as usual but the filename ends with m. This parameter indicates that this smaller image is available.

Example: https://i.4cdn.org/k/1546907428891.jpg https://i.4cdn.org/k/1546907428891m.jpg

[AGSPhoenix]

Fixed in #69.