Straight from rails-1.2.1/lib/fcgi_handler.rb:
rails-1.2.1/lib/fcgi_handler.rb
SIGNALS = { 'HUP' => :reload, 'INT' => :exit_now, 'TERM' => :exit_now, 'USR1' => :exit, 'USR2' => :restart, 'SIGTRAP' => :breakpoint }