Move system startup message prior to any calls out of data directory.

This allows us to see what mode the server is in before it starts to
perform actions that can block or hang. Otherwise server messages
may not appear until after messages that say FATAL the database
server is starting up.

Author: simonat2ndQuadrant

src/backend/access/transam/xlog.c

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.386 2010/04/01 00:43:29 rhaas Exp $
+ * $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.387 2010/04/02 13:10:56 sriggs Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -5557,6 +5557,24 @@ StartupXLOG(void)
 			restartPointCommand ? restartPointCommand : "",
 			sizeof(XLogCtl->restartPointCommand));
 
+	if (InArchiveRecovery)
+	{
+		if (StandbyMode)
+			ereport(LOG,
+					(errmsg("entering standby mode")));
+		else if (recoveryTarget == RECOVERY_TARGET_XID)
+			ereport(LOG,
+					 (errmsg("starting point-in-time recovery to XID %u",
+						 recoveryTargetXid)));
+		else if (recoveryTarget == RECOVERY_TARGET_TIME)
+			ereport(LOG,
+					(errmsg("starting point-in-time recovery to %s",
+							timestamptz_to_str(recoveryTargetTime))));
+		else
+			ereport(LOG,
+					(errmsg("starting archive recovery")));
+	}
+
 	if (read_backup_label(&checkPointLoc))
 	{
 		/*
@@ -5694,23 +5712,7 @@ StartupXLOG(void)
 		 * backup history file.
 		 */
 		if (InArchiveRecovery)
-		{
-			if (StandbyMode)
-				ereport(LOG,
-						(errmsg("entering standby mode")));
-			else if (recoveryTarget == RECOVERY_TARGET_XID)
-				ereport(LOG,
-					 (errmsg("starting point-in-time recovery to XID %u",
-							 recoveryTargetXid)));
-			else if (recoveryTarget == RECOVERY_TARGET_TIME)
-				ereport(LOG,
-						(errmsg("starting point-in-time recovery to %s",
-								timestamptz_to_str(recoveryTargetTime))));
-			else
-				ereport(LOG,
-						(errmsg("starting archive recovery")));
 			ControlFile->state = DB_IN_ARCHIVE_RECOVERY;
-		}
 		else
 		{
 			ereport(LOG,