some comments rewording in recovery.conf.sample about SR

diff --git a/src/backend/access/transam/recovery.conf.sample b/src/backend/access/transam/recovery.conf.sample
index 146ad03..9a68fb0 100644
--- a/src/backend/access/transam/recovery.conf.sample
+++ b/src/backend/access/transam/recovery.conf.sample
@@ -3,8 +3,8 @@
 # -------------------------------
 #
 # Edit this file to provide the parameters that PostgreSQL needs to
-# perform an archive recovery of a database, or to act as a log-streaming
-# replication standby.
+# perform an archive recovery of a database, or to act as a log replication
+# standby, optionnaly streamed.
 #
 # If "recovery.conf" is present in the PostgreSQL data directory, it is
 # read on postmaster startup.  After successful recovery, it is renamed
@@ -88,21 +88,29 @@
 # STANDBY SERVER PARAMETERS
 #---------------------------------------------------------------------------
 #
-# When standby_mode is enabled, the PostgreSQL server will work as
-# a standby. It tries to connect to the primary according to the
-# connection settings primary_conninfo, and receives XLOG records
-# continuously.
+# standby_mode
+#
+# When standby_mode is enabled, the PostgreSQL server will work as a
+# standby. It will keep waiting for the next XLOG records, either using the
+# restore_command and/or primary_conninfo depending on their setting, and
+# never start as a primary server by itself.
 #
 #standby_mode = off
 #
+# primary_conninfo
+#
+# When primary_conninfo is set, the PostgreSQL server tries to connect to
+# the primary using this connection string and receives XLOG records
+# continuously.
+#
 #primary_conninfo = ''		# e.g. 'host=localhost port=5432'
 #
 #
-# By default, a standby server keeps streaming XLOG records from the
-# primary indefinitely. If you want to stop streaming and finish recovery,
+# By default, a standby server keeps restoring XLOG records from the primary
+# indefinitely. If you want to stop the standby mode, finish recovery and
 # opening up the system in read/write mode, specify path to a trigger file.
-# Server will poll the trigger file path periodically and stop streaming
-# when it's found.
+# Server will poll the trigger file path periodically and start as a primary
+# server when it's found.
 #
 #trigger_file = ''
 #