ocamlopt - Enables ocamlopt support (ocaml native code compiler) -- Produces faster programs (Warning: you have to disable/enable it at a global scale)
postgres - Adds support for the postgresql database
sqlite - Adds support for sqlite - embedded sql database
sqlite3 - Adds support for sqlite3 - embedded sql database
vhosts - Adds support for installing web-based applications into a virtual-hosting environment
