BUG #3857: pg_restore -t tablename doesn't restore constraints of this table

The following bug has been logged online:

Bug reference: 3857
Logged by: Jochen Schwarz
Email address: js(at)webmail(dot)eurodata(dot)de
PostgreSQL version: 8.2.6
Operating system: Windows and Linux
Description: pg_restore -t tablename doesn't restore constraints of
this table
Details:

pg_restore doesn't restore constraints if you only restore a table.

Here is a test-scenario:

create database test;

create table testtable ( id integer primary key );

test=# \d testtable
Tabelle public.testtable
Spalte | Typ | Attribute
--------+---------+-----------
id | integer | not null
Indexe:
testtable_pkey PRIMARY KEY, btree (id)

pg_dump -F c test >/tmp/test.dmp

drop table testtable;

pg_restore -F c -d test -t testtable /tmp/test.dmp

test=# \d testtable
Tabelle public.testtable
Spalte | Typ | Attribute
--------+---------+-----------
id | integer | not null

the primary key testtable_pkey is not restored!

pg_restore -F c -d test -I testtable_pkey is not working either.