add link, remove TSearch2

Author: Richard Jones

doc/postgresql.txt

@@ -16,6 +16,10 @@ additionally install:
 2. The psycopg python interface to PostgreSQL:
    http://initd.org/software/initd/psycopg
 
+Some advice on setting up the postgresql backend may be found at:
+
+  http://www.magma.com.ni/wiki/index.cgi?TipsRoundupPostgres
+
 
 Running the PostgreSQL unit tests
 =================================
@@ -27,48 +31,6 @@ you wish to test against a different database.
 
 The test database will be called "rounduptest".
 
-Using the tsearch2 indexer
-==========================
-
-You have the option of using a different indexer for full-text searches. It is
-based on tsearch2_, a module for PostgreSQL 7.3 and above. It is faster and
-more scalable than the standard indexer. The tsearch2 indexer is a good choice
-if you have over a 1000 issues in one tracker.
-
-.. _tsearch2: http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/
-
-Installation
-------------
-
-tsearch2 is available from the contrib subtree of the PostgreSQL source tree
-starting with PostgreSQL 7.4. This means installing tsearch2 on Debian is
-simple::
-
-  apt-get install postgresql-contrib
-
-FreeBSD is equally simple::
-
-  pkg_add -r postgresql-contrib
-
-RPM packages for Fedora Core are available from all PostgreSQL ftp mirrors_.
-Packages for Suse, Mandrake and others are available from those distributors.
-
-.. _mirrors: http://www.postgresql.org/download/mirrors-ftp
-
-If you're compiling from source, I'm assuming you already know how to build and
-install the main PostgreSQL source. Once you've done that, running the
-following commands in the 'contrib' directory will build and install tsearch2::
-
-  make all
-  make install
-
-Configuring Roundup
--------------------
-
-Roundup implements tsearch2 as a distinct backend from the postgresql backend.
-Switching to tsearch2 is the same process as `migrating to any other backend`__.
-
-__ admin_guide.html#migrating-backends
 
 Credit
 ======