Typo BUNDLER_GEMFILE -> BUNDLE_GEMFILE
Merge pull request #540 from allaire/patch-1

Typo BUNDLER_GEMFILE -> BUNDLE_GEMFILE
BSD-3-Clause over BSD to avoid confusion
Merge pull request #544 from chulkilee/bsd-3-clause

BSD-3-Clause over BSD to avoid confusion
pumactl - do not modify original ARGV

ARGV used later in `lib/puma/cli.rb` to construct `restart_cmd`