Build against Passenger 5.1.11

Merge pull request phusion#196 from otakemaru/fix-changelog-version

fix changelog version

Release 0.9.24, built with latest Passenger (5.1.7).

Release 0.9.23, built with latest Passenger (5.1.6).

5.1.6 has a security fix for Nginx.

Changelog for release 0.9.22

Update Changelog

Bump version to 0.9.20

Fix instructions for running the Ruby installation scripts in the -cu…

…stomizable variant

Upgrade to Ruby 2.1.7, Ruby 2.2.3, JRuby 0.9.4.0, Node.js 0.12.9

Release 0.9.17