An sql.Rows generated in a request handler is not closed automatically, and DB
connections stay open until the http.Request is closed. (Until conn.Close() is run?) If
the http connection is kept alive, each subsequent request will create a new database
connection until the database's resources are exhausted.

What steps will reproduce the problem?
1. Use github.com/jbarham/pgsqldriver (not sure if this is the culprit; setFinalizer
seems to have been used correctly)
2. Run many Query(); the resulting Rows won't close by themselves even after having been
traversed

What is the expected output? No error; only one/a few DB conns used.

What do you see instead? Hundreds of DB conns, and finally an error: "conn
error:FATAL:  remaining connection slots are reserved for non-replication superuser
connections" (PostgreSQL global maximum connection limit reached.)

Which compiler are you using (5g, 6g, 8g, gccgo)? 6g

Which operating system are you using? Ubuntu 11.10

Which revision are you using?  weekly.2011-12-22

Please provide any additional information below.

PoC: https://gist.github.com/1524739 (run and go to http://localhost:9000/)