[Dovecot] pgsql documentation

[Tom Allison]

 From dovecot-pgsql.conf
# Examples:
#   connect = host=192.168.1.1 dbname=users
#   connect = host=sql.example.com dbname=virtual user=virtual

There is a reference to identify the rest of the parameters via libpq in 
the postgres documentation.

 From postgres, libpq says the connection environment variables are:
hostname:port:database:username:password
http://www.postgresql.org/docs/7.4/static/libpq-pgpass.html

Should the dovecot-pgsql.conf docs be changed from
"dbname=users" to "database=users"

??