Abnormal behavior after bumping net.inet6.udp6.sendspace

[Timo Buhrmester <timo%math.uni-bonn.de@localhost>]

On amd64 10.1_STABLE, if I increase net.inet6.udp6.sendspace to 
209716 or larger, the machine in question ceases to serve new SSH
sessions (the connection gets closed immediately) and attempting
to restart sshd (via the system console) yields to something like
"Bad address <NULL>" (or similar) and sshd not starting.

Can anybody confirm this bug?