Purge 4.2BSD TCP tasks in FIN_WAIT_2 state?

[code 101]

Are there any tools for manually cleaning up after TCP?
Netstat output is as follows:

Active connections
Proto Recv-Q Send-Q  Local Address      Foreign Address    (state)
tcp        0      0  flakey.login       quirky.1023        FIN_WAIT_2
tcp        0      0  flakey.fshare      down.659           FIN_WAIT_2

I have observed that they go away by themselves after some
indeterminate length of time -- sometimes minutes, sometimes days.
Aside from reboot or sleep large n, is there a tool to tell the
networking subsystem what's what?

	Peter