From: Jun Kuwamura <juk@rccm.co.jp>

  I do not know about these contributions well as I only made the binaries
to contribute to a Japanese Linux package.(I did not test them.)  But I
try to make some brief introduction about the contrib directory with my
poor English.  Here is a draft of README about contrib directory:

contrib/README

+  This directory contains the contribution functions or tools with
+PostgreSQL.
+
+ - contrib -|
+            |- apache_logging -
+	    |   Getting Apache to log to PostgreSQL
+	    |   	by Terry Mackintosh <terry@terrym.com>
+            |- array -
+	    |   Array iterator functions
+	    |   	by Massimo Dal Zotto <dz@cs.unitn.it>
+            |- datetime -
+	    |   Date & time functions
+	    |   	by Sergio Lenzi <lenzi@bsi.com.br>
+            |- int8 -
+	    |   64-bit integer arithmetic for Postgres
+	    |   	by Thomas G. Lockhart <Thomas.Lockhart@jpl.nasa.gov>
+            |- ip_and_mac -
+	    |   PostgreSQL type extensions for IP and MAC addresses
+	    |   	by Tom Ivar Helbekkmo <tih@Hamartun.Priv.NO>
+            |- linux -
+	    |   Start postgres back end system
+	    |   	by Thomas Lockhart <lockhart@alumni.caltech.edu>
+            |- miscutil -
+	    |   Postgres assert checking and various utility functions
+	    |   	by Dal Zotto <dz@cs.unitn.it>
+            |- pginterface -
+	    |   A crude C/4GL
+	    |   	by Bruce Momjian <root@candle.pha.pa.us>
+            |- sequence -
+	    |   Set a new sequence value
+	    |   	by Massimo Dal Zotto <dz@cs.unitn.it>
+            |- soundex -
+	    |   Prototype for soundex function
+            |- spi -
+	    |   A general trigger function autoinc() and so on.
+            |- string -
+	    |   New input/output conversion routines for strings
+	    |   	by Massimo Dal Zotto <dz@cs.unitn.it>
+            |- unixdate -
+	    |   Conversions from integer to datetime
+	    |   	by Thomas Lockhart <lockhart@alumni.caltech.edu>
+            |- userlock -
+	    |   User locks
+	    |   	by Massimo Dal Zotto <dz@cs.unitn.it>
+