And this is exactly what the FHS is for. Documentation for "blah" lives in /usr/share/doc/blah/. Simple and easy.
As mentioned, Debian extends this by recommending a README.Debian to explain what differences from upstream documentation or defaults exist, and the rationale.
For example, enjoy the simplicity of /usr/share/doc/phpmyadmin/README.Debian. It answers all your questions, and also makes mention of security concerns you may not have realised exist had you, for example, just extracted a copy of phpmyadmin into your web site.
And now you have enough information to know what to do next with anything that you install using apt-get, Or yum, or rpm, or portage, or (I'm speculating here) autopackage for that matter.
As mentioned, Debian extends this by recommending a README.Debian to explain what differences from upstream documentation or defaults exist, and the rationale.
For example, enjoy the simplicity of /usr/share/doc/phpmyadmin/README.Debian. It answers all your questions, and also makes mention of security concerns you may not have realised exist had you, for example, just extracted a copy of phpmyadmin into your web site.
And now you have enough information to know what to do next with anything that you install using apt-get, Or yum, or rpm, or portage, or (I'm speculating here) autopackage for that matter.