Remove lock postgresql.conf variables

I have removed the lock* GUC variables from postgresql.conf because they
are enabled only for certain builds.

I also documented why certain variables don't appear in postgresql.conf.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
Index: src/backend/utils/misc/guc.c
===================================================================
RCS file: /cvsroot/pgsql-server/src/backend/utils/misc/guc.c,v
retrieving revision 1.127
diff -c -c -r1.127 guc.c
*** src/backend/utils/misc/guc.c    28 May 2003 18:19:09 -0000    1.127
--- src/backend/utils/misc/guc.c    2 Jun 2003 16:03:20 -0000
***************
*** 689,694 ****
--- 689,695 ----
          60, 1, 600, NULL, NULL
      },

+     /* Not for general use */
      {
          {"pre_auth_delay", PGC_SIGHUP}, &PreAuthDelay,
          0, 0, 60, NULL, NULL
***************
*** 871,876 ****
--- 872,878 ----
          "$user,public", assign_search_path, NULL
      },

+     /* Can't be set in postgresql.conf */
      {
          {"server_encoding", PGC_INTERNAL, GUC_REPORT},
          &server_encoding_string,
***************
*** 888,893 ****
--- 890,896 ----
          "notice", assign_log_min_messages, NULL
      },

+     /* Not for general use --- used by SET SESSION AUTHORIZATION */
      {
          {"session_authorization", PGC_USERSET, GUC_NO_SHOW_ALL | GUC_NO_RESET_ALL},
          &session_authorization_string,
Index: src/backend/utils/misc/postgresql.conf.sample
===================================================================
RCS file: /cvsroot/pgsql-server/src/backend/utils/misc/postgresql.conf.sample,v
retrieving revision 1.78
diff -c -c -r1.78 postgresql.conf.sample
*** src/backend/utils/misc/postgresql.conf.sample    14 May 2003 03:26:02 -0000    1.78
--- src/backend/utils/misc/postgresql.conf.sample    2 Jun 2003 16:03:20 -0000
***************
*** 182,201 ****


  #
- #    Lock Tracing
- #
- #trace_notify = false
-
- # requires LOCK_DEBUG
- #trace_locks = false
- #trace_userlocks = false
- #trace_lwlocks = false
- #debug_deadlocks = false
- #trace_lock_oidmin = 16384
- #trace_lock_table = 0
-
-
- #
  #    Misc
  #
  #dynamic_library_path = '$libdir'
--- 182,187 ----