<command>pg_xlogdump</command> renamed to <command>pg_waldump</command>pg_xlogdumppg_waldump
PostgreSQL 9.6 and below provided a command named
pg_xlogdumppg_xlogdump
to read write-ahead-log (WAL) files. This command was renamed to pg_waldump, see
for documentation of pg_waldump and see
the release notes for PostgreSQL 10 for details
on this change.