Shared library version

There appear to have been changes in the shared library libpq.

The default library from 6.5.3 with psql from current tree gives:
 olly@linda$ psql template1 ... psql: error in loading shared libraries: psql: undefined symbol:   
createPQExpBuffer
 olly@linda$ LD_PRELOAD=/usr/local/pgsql/lib/libpq.so.2.0 psql template1 ... template1=>

Since the library has changed, it needs to have a new version number.

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver              PGP key from public servers; key
ID32B8FAA1                ========================================    "Be patient therefore, brethren, unto the coming
ofthe     Lord...Be patient; strengthen your hearts, for      the coming of the Lord draweth nigh."
                       James 5:7,8