[COOK-1979] - curl-dev doesn't exist in ubuntu 10.04 - 12.04
Support proxy_read_timeout option (nginx.conf)
Install 1.2.6 for source installs

This is the latest stable release
Update the checksum to 1.2.6
Update to passenger 3.0.19

Large list of bug fixes and aligns with the current version of nginx
that we install
Update the checksums for the current files
Use the correct SHA-256 checksum for upload_progress
Convert all platform checks to platform_family

This adds support for fedora to the passenger recipe and fixes oracle
support in the source recipe