Revert "postmaster: Start syslogger earlier".

This commit reverts 57431a9.

While that's still a good idea in the abstract, we found out
that there are multiple crasher bugs in it on Windows builds,
making the logging_collector option unusable on Windows.
There's no time left to fix these issues before 12beta1,
so revert the patch to allow Windows beta testing to proceed.
We'll try again at some future date.

Per bug #15804 from Yulian Khodorkovskiy and additional
investigation by Michael Paquier.

Discussion: https://postgr.es/m/15804-3721117bf40fb654@postgresql.org

Author: tglsfdc

src/backend/postmaster/postmaster.c

@@ -993,66 +993,6 @@ PostmasterMain(int argc, char *argv[])
 	 */
 	InitializeMaxBackends();
 
-	/*
-	 * Initialize pipe (or process handle on Windows) that allows children to
-	 * wake up from sleep on postmaster death.
-	 */
-	InitPostmasterDeathWatchHandle();
-
-	/*
-	 * Forcibly remove the files signaling a standby promotion request.
-	 * Otherwise, the existence of those files triggers a promotion too early,
-	 * whether a user wants that or not.
-	 *
-	 * This removal of files is usually unnecessary because they can exist
-	 * only during a few moments during a standby promotion. However there is
-	 * a race condition: if pg_ctl promote is executed and creates the files
-	 * during a promotion, the files can stay around even after the server is
-	 * brought up to new master. Then, if new standby starts by using the
-	 * backup taken from that master, the files can exist at the server
-	 * startup and should be removed in order to avoid an unexpected
-	 * promotion.
-	 *
-	 * Note that promotion signal files need to be removed before the startup
-	 * process is invoked. Because, after that, they can be used by
-	 * postmaster's SIGUSR1 signal handler.
-	 */
-	RemovePromoteSignalFiles();
-
-	/* Do the same for logrotate signal file */
-	RemoveLogrotateSignalFiles();
-
-	/* Remove any outdated file holding the current log filenames. */
-	if (unlink(LOG_METAINFO_DATAFILE) < 0 && errno != ENOENT)
-		ereport(LOG,
-				(errcode_for_file_access(),
-				 errmsg("could not remove file \"%s\": %m",
-						LOG_METAINFO_DATAFILE)));
-
-	/*
-	 * If enabled, start up syslogger collection subprocess
-	 */
-	SysLoggerPID = SysLogger_Start();
-
-	/*
-	 * Reset whereToSendOutput from DestDebug (its starting state) to
-	 * DestNone. This stops ereport from sending log messages to stderr unless
-	 * Log_destination permits.  We don't do this until the postmaster is
-	 * fully launched, since startup failures may as well be reported to
-	 * stderr.
-	 *
-	 * If we are in fact disabling logging to stderr, first emit a log message
-	 * saying so, to provide a breadcrumb trail for users who may not remember
-	 * that their logging is configured to go somewhere else.
-	 */
-	if (!(Log_destination & LOG_DESTINATION_STDERR))
-		ereport(LOG,
-				(errmsg("ending log output to stderr"),
-				 errhint("Future log output will go to log destination \"%s\".",
-						 Log_destination_string)));
-
-	whereToSendOutput = DestNone;
-
 	/* Report server startup in log */
 	ereport(LOG,
 			(errmsg("starting %s", PG_VERSION_STR)));
@@ -1248,6 +1188,12 @@ PostmasterMain(int argc, char *argv[])
 	 */
 	set_stack_base();
 
+	/*
+	 * Initialize pipe (or process handle on Windows) that allows children to
+	 * wake up from sleep on postmaster death.
+	 */
+	InitPostmasterDeathWatchHandle();
+
 #ifdef WIN32
 
 	/*
@@ -1301,6 +1247,60 @@ PostmasterMain(int argc, char *argv[])
 	 */
 	RemovePgTempFiles();
 
+	/*
+	 * Forcibly remove the files signaling a standby promotion request.
+	 * Otherwise, the existence of those files triggers a promotion too early,
+	 * whether a user wants that or not.
+	 *
+	 * This removal of files is usually unnecessary because they can exist
+	 * only during a few moments during a standby promotion. However there is
+	 * a race condition: if pg_ctl promote is executed and creates the files
+	 * during a promotion, the files can stay around even after the server is
+	 * brought up to new master. Then, if new standby starts by using the
+	 * backup taken from that master, the files can exist at the server
+	 * startup and should be removed in order to avoid an unexpected
+	 * promotion.
+	 *
+	 * Note that promotion signal files need to be removed before the startup
+	 * process is invoked. Because, after that, they can be used by
+	 * postmaster's SIGUSR1 signal handler.
+	 */
+	RemovePromoteSignalFiles();
+
+	/* Do the same for logrotate signal file */
+	RemoveLogrotateSignalFiles();
+
+	/* Remove any outdated file holding the current log filenames. */
+	if (unlink(LOG_METAINFO_DATAFILE) < 0 && errno != ENOENT)
+		ereport(LOG,
+				(errcode_for_file_access(),
+				 errmsg("could not remove file \"%s\": %m",
+						LOG_METAINFO_DATAFILE)));
+
+	/*
+	 * If enabled, start up syslogger collection subprocess
+	 */
+	SysLoggerPID = SysLogger_Start();
+
+	/*
+	 * Reset whereToSendOutput from DestDebug (its starting state) to
+	 * DestNone. This stops ereport from sending log messages to stderr unless
+	 * Log_destination permits.  We don't do this until the postmaster is
+	 * fully launched, since startup failures may as well be reported to
+	 * stderr.
+	 *
+	 * If we are in fact disabling logging to stderr, first emit a log message
+	 * saying so, to provide a breadcrumb trail for users who may not remember
+	 * that their logging is configured to go somewhere else.
+	 */
+	if (!(Log_destination & LOG_DESTINATION_STDERR))
+		ereport(LOG,
+				(errmsg("ending log output to stderr"),
+				 errhint("Future log output will go to log destination \"%s\".",
+						 Log_destination_string)));
+
+	whereToSendOutput = DestNone;
+
 	/*
 	 * Initialize stats collection subsystem (this does NOT start the
 	 * collector process!)