Explicitly document Red Hat, CentOS and Amazon Linux as being supported
Explicitly document Red Hat, CentOS and Amazon Linux as being supported

[ci:skip]

cgvarela/passenger,kewaunited/passenger,phusion/passenger,clemensg/passenger,cgvarela/passenger,kewaunited/passenger,cgvarela/passenger,kewaunited/passenger,kewaunited/passenger,antek-drzewiecki/passenger,cgvarela/passenger,cgvarela/passenger,antek-drzewiecki/passenger,kewaunited/passenger,kewaunited/passenger,antek-drzewiecki/passenger,clemensg/passenger,cgvarela/passenger,cgvarela/passenger,phusion/passenger,clemensg/passenger,phusion/passenger,kewaunited/passenger,cgvarela/passenger,antek-drzewiecki/passenger,clemensg/passenger,antek-drzewiecki/passenger,clemensg/passenger,phusion/passenger,clemensg/passenger,antek-drzewiecki/passenger,phusion/passenger,kewaunited/passenger,antek-drzewiecki/passenger,clemensg/passenger,clemensg/passenger,antek-drzewiecki/passenger,phusion/passenger,phusion/passenger,phusion/passenger