Document some variables.
Document some variables.

jawj/passenger,erikogan/passenger,antek-drzewiecki/passenger,erikogan/passenger,clemensg/passenger,phusion/passenger,clemensg/passenger,gravitystorm/passenger,cgvarela/passenger,erikogan/passenger,openSUSE/passenger,gravitystorm/passenger,openSUSE/passenger,phusion/passenger,fabiokung/passenger-debian,gravitystorm/passenger,bf4/passenger,erikogan/passenger,jawj/passenger,antek-drzewiecki/passenger,pkmiec/passenger,phusion/passenger,cgvarela/passenger,jawj/passenger,antek-drzewiecki/passenger,antek-drzewiecki/passenger,clemensg/passenger,cgvarela/passenger,erikogan/passenger,gravitystorm/passenger,pkmiec/passenger,antek-drzewiecki/passenger,bf4/passenger,phusion/passenger,kewaunited/passenger,clemensg/passenger,pkmiec/passenger,antek-drzewiecki/passenger,pkmiec/passenger,cgvarela/passenger,openSUSE/passenger,bf4/passenger,kewaunited/passenger,bf4/passenger,kewaunited/passenger,clemensg/passenger,fabiokung/passenger-debian,jawj/passenger,erikogan/passenger,kewaunited/passenger,pkmiec/passenger,clemensg/passenger,fabiokung/passenger-debian,fabiokung/passenger-debian,cgvarela/passenger,gravitystorm/passenger,clemensg/passenger,bf4/passenger,kewaunited/passenger,pkmiec/passenger,cgvarela/passenger,fabiokung/passenger-debian,openSUSE/passenger,pkmiec/passenger,clemensg/passenger,jawj/passenger,bf4/passenger,openSUSE/passenger,antek-drzewiecki/passenger,jawj/passenger,openSUSE/passenger,bf4/passenger,jawj/passenger,antek-drzewiecki/passenger,fabiokung/passenger-debian,cgvarela/passenger,kewaunited/passenger,kewaunited/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,gravitystorm/passenger,kewaunited/passenger,cgvarela/passenger