pt-upgrade documentation doesn't have the type tcpdump

The official pt-upgrade documentation doesn't list tcpdump as supported type, 
but it is referenced under "USAGE" and several other sections.
https://www.percona.com/doc/percona-toolkit/LATEST/pt-upgrade.html

Type list:

--type{{}}

type: string; default: slowlog

Type of log files. Valid types are:

VALUE          LOG TYPE =======
slowlog        MySQL slow log
genlog         MySQL general log
binlog          MySQL binary log (converted by mysqlbinlog)
rawlog         Custom log with one SQL statement per line

 
Usage information:

USAGE

pt-upgrade [OPTIONS] LOGS|RESULTS DSN [DSN]
pt-upgrade executes queries in the given MySQL LOGS on each DSN, compares the results, and reports any significant differences. The tool can also save the results for later analyses. LOGS can be slow, general, binary, tcpdump, and “raw”.

It is also listed as an option in pt-upgrade --help: 

shell> pt-upgrade --help
pt-upgrade executes queries in the given MySQL C<LOGS> on each C<DSN>, compares
the results, and reports any significant differences. The tool can also save
the results for later analyses. C<LOGS> can be slow, general, binary, tcpdump,
and "raw". 

 
Expected: --type parameter section listing tcpdump as available option.