Reorganize some sections in the users guide.
Reorganize some sections in the users guide.

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