fork_process() for pgstat

Much to my chagrin, I recently noticed that I forgot to convert the
pgstat fork() code to use fork_process() when I applied the original
fork_process() patch a few months ago. This patch does that.

Barring any objections, I'll apply this tomorrow.

-Neil
Index: src/backend/postmaster/pgstat.c
===================================================================
RCS file: /var/lib/cvs/pgsql/src/backend/postmaster/pgstat.c,v
retrieving revision 1.89
diff -c -r1.89 pgstat.c
*** src/backend/postmaster/pgstat.c    31 Mar 2005 23:20:49 -0000    1.89
--- src/backend/postmaster/pgstat.c    7 Apr 2005 07:51:23 -0000
***************
*** 40,45 ****
--- 40,46 ----
  #include "libpq/pqsignal.h"
  #include "mb/pg_wchar.h"
  #include "miscadmin.h"
+ #include "postmaster/fork_process.h"
  #include "postmaster/postmaster.h"
  #include "storage/backendid.h"
  #include "storage/fd.h"
***************
*** 576,601 ****
      /*
       * Okay, fork off the collector.
       */
-
-     fflush(stdout);
-     fflush(stderr);
-
- #ifdef __BEOS__
-     /* Specific beos actions before backend startup */
-     beos_before_backend_startup();
- #endif
-
  #ifdef EXEC_BACKEND
      switch ((pgStatPid = pgstat_forkexec(STAT_PROC_BUFFER)))
  #else
!     switch ((pgStatPid = fork()))
  #endif
      {
          case -1:
- #ifdef __BEOS__
-             /* Specific beos actions */
-             beos_backend_startup_failed();
- #endif
              ereport(LOG,
                      (errmsg("could not fork statistics buffer: %m")));
              return 0;
--- 577,589 ----
      /*
       * Okay, fork off the collector.
       */
  #ifdef EXEC_BACKEND
      switch ((pgStatPid = pgstat_forkexec(STAT_PROC_BUFFER)))
  #else
!     switch ((pgStatPid = fork_process()))
  #endif
      {
          case -1:
              ereport(LOG,
                      (errmsg("could not fork statistics buffer: %m")));
              return 0;
***************
*** 603,612 ****
  #ifndef EXEC_BACKEND
          case 0:
              /* in postmaster child ... */
- #ifdef __BEOS__
-             /* Specific beos actions after backend startup */
-             beos_backend_startup();
- #endif
              /* Close the postmaster's sockets */
              ClosePostmasterPorts(false);

--- 591,596 ----