Where can I learn about the timeouts for FIN_WAIT_2?

I am curious how long this connection will stay up.

$ uname -p -s -r
NetBSD 1.5.1_BETA i386
$ pkg_info cvs | head -1
Information for cvs-1.11nb2:
$ ps auxw | grep cvs | grep -v grep
reed 1271  0.0  0.8   928  1080 p3 I+    7:08PM 0:11.76 cvs update
$ fstat -p 1271 | grep internet
reed     cvs         1271    4* internet stream tcp c069bbb0
192.168.0.2:65335 <-> 204.152.184.161:2401
$ netstat | grep cvs
tcp        0      0  rainier.65335          nbanoncvs2.isc.o.cvsps
FIN_WAIT_2


   Jeremy C. Reed
   http://bsd.reedmedia.net/