pgsql: Add --encoding to pg_dump.

Log Message:
-----------
Add --encoding to pg_dump.

The Problem:  Occassionally a DBA needs to dump a database to a new
encoding.   In instances where the current encoding, (or lack of an
encoding, like SQL_ASCII) is poorly supported on the target  database
server, it can be useful to dump into a particular  encoding.  But,
currently the only way to set the encoding of  a pg_dump file is to
change  client_encoding in postgresql.conf and restart postmaster.
This is more  than a little awkward for production systems.

Magnus Hagander

Modified Files:
--------------
    pgsql/doc/src/sgml/ref:
        pg_dump.sgml (r1.78 -> r1.79)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/pg_dump.sgml.diff?r1=1.78&r2=1.79)
    pgsql/src/bin/pg_dump:
        pg_dump.c (r1.414 -> r1.415)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_dump.c.diff?r1=1.414&r2=1.415)