pg_upgrade docs: clarify instructions on standby extensions

Previously the pg_upgrade standby upgrade instructions said not to
execute pgcrypto.sql, but it should have referenced the extension
command "CREATE EXTENSION pgcrypto".  This patch makes that doc change.

Reported-by: a private bug report
Backpatch-through: 9.4, where standby instructions were added

diff --git a/doc/src/sgml/ref/pgupgrade.sgml b/doc/src/sgml/ref/pgupgrade.sgml
index df5c122cb17934d0e4c7c48c584016e48b7b9718..5df9409e97bc3c817045c587da5becd742c541bb 100644 (file)
--- a/doc/src/sgml/ref/pgupgrade.sgml
+++ b/doc/src/sgml/ref/pgupgrade.sgml
@@ -273,7 +273,8 @@ make prefix=/usr/local/pgsql.new install
      into the new cluster, e.g. pgcrypto.so,
      whether they are from contrib
      or some other source. Do not install the schema definitions, e.g.
-     pgcrypto.sql, because these will be upgraded from the old cluster.
+     CREATE EXTENSION pgcrypto, because these will be upgraded
+     from the old cluster.
      Also, any custom full text search files (dictionary, synonym,
      thesaurus, stop words) must also be copied to the new cluster.