pgaudit_func_ddl_command_end(): honour GUC setting
Very basic authentication logging

Outputs something like this:

    2014-04-14 10:29:34.183 JST LOG:  foo,127.0.0.1,password,foo,-2
    2014-04-14 10:29:36.697 JST LOG:  foo,127.0.0.1,password,foo,-1