theforeman/staypuft — pull request #394 by bcrochet (2014-12-17 16:23:16+00:00)
Title: BZ #1151439: Set MTU for VXLAN and GRE to -50 of MTU of physint

https://bugzilla.redhat.com/show_bug.cgi?id=1151439

Actually compute the MTU instead of just returning the given value.