Compile mtr from the newdns branch
See https://bugs.alpinelinux.org/issues/1144
there is now a newdns branch that compiles fine on alpine and hostnames work.
There’s a plan to merge it to master, but no action for 9 months.
https://github.com/traviscross/mtr/issues/78
I’m suggesting to do the same as openwrt and switch to newdns.
Latest release is from dec 2014 anyway, so there won’t be anything lost
until they eventually get it merged.
No hostnames make it harder to use..
(from redmine: issue id 4967, created on 2015-12-19)