doc: Further clarify how recovery target parameters are applied

Recovery target parameters are all applied even in standby mode.  The
previous documentation mostly wished they were not but this was never
the case.

Discussion: https://www.postgresql.org/message-id/flat/e445616d-023e-a268-8aa1-67b8b335340c%40pgmasters.net

doc/src/sgml/config.sgml

@@ -3152,13 +3152,11 @@ include_dir 'conf.d'
      recovery when the end of archived WAL is reached, but will keep trying to
      continue recovery by connecting to the sending server as specified by the
      <varname>primary_conninfo</varname> setting and/or by fetching new WAL
-     segments using <varname>restore_command</varname>.  In this mode, you can
-     use parameters in both <xref
-     linkend="runtime-config-wal-archive-recovery"/> and <xref
-     linkend="runtime-config-replication-standby"/>.  Parameters from
-     <xref linkend="runtime-config-wal-recovery-target"/> will not be used,
-     with the exception of <xref linkend="guc-recovery-target-timeline"/>
-     which allows a timeline to be selected for recovery.
+     segments using <varname>restore_command</varname>.  For this mode, the
+     parameters from this section and <xref
+     linkend="runtime-config-replication-standby"/> are of interest.
+     Parameters from <xref linkend="runtime-config-wal-recovery-target"/> will
+     also be applied but are typically not useful in this mode.
     </para>
 
     <para>
@@ -3168,10 +3166,10 @@ include_dir 'conf.d'
      <filename>recovery.signal</filename> files are created, standby mode
      takes precedence.  Targeted recovery mode ends when the archived WAL is
      fully replayed, or when <varname>recovery_target</varname> is reached.
-     In this mode, you can use parameters from both <xref
-     linkend="runtime-config-wal-archive-recovery"/> and <xref
-     linkend="runtime-config-wal-recovery-target"/>.  Parameters from <xref
-     linkend="runtime-config-replication-standby"/> will not be used.
+     In this mode, the parameters from both this section and <xref
+     linkend="runtime-config-wal-recovery-target"/> will be used.  Parameters
+     from <xref linkend="runtime-config-replication-standby"/> will not be
+     used.
     </para>
 
     <variablelist>