--log-file option has been added in 0.5.13[0]. munge provided by current stable ebuild (0.5.10-r2) doesn't support this option. So service can't start. [0] https://github.com/dun/munge/releases/tag/munge-0.5.13
Created attachment 583928 [details, diff] sys-auth/munge: restore stable initd script Restore the 0.5.10 init script that does not pass --log-file to munged.
Created a pull request with s-o-b tag: https://github.com/gentoo/gentoo/pull/12508
See comments on PR, should all be good now.