doc: Add timeline as valid recovery target in standby.signal documentation

The documentation states that no target settings will be used when
standby.signal is present, but this is not quite the case since
recovery_target_timeline is a valid recovery target for a standby.

Update the documentation with this exception.

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

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 6612f95f9fad28ae1b73f5c91faee8385b501599..4784b4b18e89eaaf7fc5b1fe1d6a1eb1cda632e9 100644 (file)
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3156,7 +3156,9 @@ include_dir 'conf.d'
      use parameters in both 
      linkend="runtime-config-wal-archive-recovery"/> and 
      linkend="runtime-config-replication-standby"/>.  Parameters from
-      will not be used.
+      will not be used,
+     with the exception of 
+     which allows a timeline to be selected for recovery.