This patch fixes a bug in aufs that can cause docker processes to enter
a defunct state but still consume 100% cpu. The processes are unkillable
as is the entire docker container, with the only recourse being to reboot
the machine. The problem was reported to Debian in the following report:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812207
Message #47 in that exchange contains two patches which resolve the problem,
and this commit is the simple combination of those two.
Chancing `lcd_dclk_freq` on its own will reduce the tearing/interlacing visible with horizontal movement of DE screen elements, however this parameter, `lcd_vt` and `lcd_ht` all influence the refresh rate, which is a bit lower on the ayufan builds that included these altered settings, so would like to stick with what is known to work. This change could also be able to be applied to the pine64 DTSs, but since I don't use them as DE boxes, haven't tested.
