/usr/ is in ruby-http-parser.rb 0.6.0~beta.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.0.0/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.0.0/ruby_http_parser.so
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/http/
/usr/lib/ruby/vendor_ruby/http/parser.rb
/usr/lib/ruby/vendor_ruby/1.9.1/
/usr/lib/ruby/vendor_ruby/1.9.1/x86_64-linux/
/usr/lib/ruby/vendor_ruby/1.9.1/x86_64-linux/ruby_http_parser.so
/usr/lib/ruby/vendor_ruby/http_parser.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/http_parser.rb-0.6.0.beta.2.gemspec
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/http_parser.rb-0.6.0.beta.2.gemspec
/usr/share/doc/
/usr/share/doc/ruby-http-parser.rb/
/usr/share/doc/ruby-http-parser.rb/README.md
/usr/share/doc/ruby-http-parser.rb/copyright
/usr/share/doc/ruby-http-parser.rb/changelog.Debian.gz