docs: update page format to specify page checksum field

Backpatch to 9.3

Per report from Steffen Hildebrandt

diff --git a/doc/src/sgml/storage.sgml b/doc/src/sgml/storage.sgml
index e0a93c1b5eb0c881e41322b2942e8c74dce1f708..b628c8fd70b94e759e24ebc27446e0187e49003e 100644 (file)
--- a/doc/src/sgml/storage.sgml
+++ b/doc/src/sgml/storage.sgml
@@ -666,10 +666,10 @@ data. Empty in ordinary tables.
    to this page
   
   
-   pd_tli
+   pd_checksum
    uint16
    2 bytes
-   TimeLineID of last change (only its lowest 16 bits)
+   Page checksum
   
   
    pd_flags