app-portage/pfl: the user does not know how to search a particular file in the online database.
Steps to Reproduce:
1. emerge app-portage/pfl
2. man pfl or pfl -h or pfl --help or pfl.
The pfl command does not display help and is executed.
* The user does not know how to proceed because there is no documentation and the user can not determine if a feature is missing or malfunctioning.
The documentation should be written, preferably by creating a manual page.