tuexen@ asked about wether using the IPV6_USE_MIN_MTU on an unconnected TCP socket should also affect the sending of the MSS option, i.e. the incoming direction. According to
RFC 3542, the option focusses in the sending direction only. When affecting the MSS option, the receiving direction is also affected. Solaris does this for a reason to be conservative. It seems good to be conservative, so tuexen@ will implement this and put a patch up for review.