The perl version takes two seconds while the python version takes more than 30 seconds
Usage: perl ./gen.pl < chnroute.txt > chnroute-merged.txt
Signed-off-by: Syrone Wong <wong.syrone@gmail.com>
Fix#569.
It could have worked without upgrading database by using an option called `bypass-china-only`. But I think we will get better readability this way.