Update cheatsheets

tldr/pg_waldump

@@ -5,10 +5,14 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # pg_waldump
 
-> Display a human-readable rendering of the write-ahead log (WAL).
+> Display a human-readable rendering of the write-ahead log (WAL) of a PostgreSQL database cluster.
 > More information: <https://www.postgresql.org/docs/current/pgwaldump.html>.
 
-- Basic invocation reading a WAL segment (or range):
+- Display WAL records from a specific segment:
+
+`pg_waldump {{start_segment}}`
+
+- Display WAL records between two segments:
 
 `pg_waldump {{start_segment}} {{end_segment}}`
 
@@ -16,14 +20,6 @@ source: https://github.com/tldr-pages/tldr.git
 
 `pg_waldump {{start_segment}} {{end_segment}} {{[-p|--path]}} {{path}}`
 
-- Start from a particular WAL location (LSN):
-
-`pg_waldump {{start_segment}} {{end_segment}} {{[-s|--start]}} {{lsn}}`
-
-- Stop at a particular WAL location (LSN):
-
-`pg_waldump {{start_segment}} {{end_segment}} {{[-e|--end]}} {{lsn}}`
-
 - Follow new WAL entries as they arrive:
 
 `pg_waldump {{start_segment}} {{end_segment}} {{[-f|--follow]}}`
@@ -32,10 +28,14 @@ source: https://github.com/tldr-pages/tldr.git
 
 `pg_waldump {{start_segment}} {{end_segment}} {{[-n|--limit]}} {{count}}`
 
-- Quiet mode (suppress output except errors):
+- Display summary statistics instead of individual records:
 
-`pg_waldump {{start_segment}} {{end_segment}} {{[-q|--quiet]}}`
+`pg_waldump {{start_segment}} {{end_segment}} {{[-z|--stats]}}`
 
 - Filter by resource manager:
 
 `pg_waldump {{start_segment}} {{end_segment}} {{[-r|--rmgr]}} {{rmgr_name}}`
+
+- Display help:
+
+`pg_waldump {{[-?|--help]}}`