log_min_duration_statement units

Someone complained that the default units for log_min_duration_statement
was not mentioned in postgresql.conf;  this applied patch fixes that.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +
Index: src/backend/utils/misc/postgresql.conf.sample
===================================================================
RCS file: /cvsroot/pgsql/src/backend/utils/misc/postgresql.conf.sample,v
retrieving revision 1.255
diff -c -c -r1.255 postgresql.conf.sample
*** src/backend/utils/misc/postgresql.conf.sample    6 Apr 2009 18:40:47 -0000    1.255
--- src/backend/utils/misc/postgresql.conf.sample    6 Apr 2009 18:58:02 -0000
***************
*** 306,312 ****
                      #   fatal
                      #   panic (effectively off)

! #log_min_duration_statement = -1    # -1 is disabled, 0 logs all statements
                      # and their durations, > 0 logs only
                      # statements running at least this time.

--- 306,312 ----
                      #   fatal
                      #   panic (effectively off)

! #log_min_duration_statement = -1ms    # -1 is disabled, 0 logs all statements
                      # and their durations, > 0 logs only
                      # statements running at least this time.