Comment 8 for bug 274069

Please don't "fix" this "bug"

The interface-mtu option is a valid method for routers to tell computers what their MTU is, so as to avoid unnecessary fragmentation. For example, I have a router that reports an MTU of 1412; anything above this does indeed get fragmented.

While I would certainly be able to add the option myself, this is not true for everyone, and there is no reason to break perfectly functional software in order to support broken routers. Instead, I suggest filtering out obviously bogus MTUs such as anything below 200. (There are some very low-MTU links out there)