Move VAGRANT_LOG logic into vagrant.rb so VAGRANT_LOG is always available

bin/vagrant

@@ -3,15 +3,6 @@ require 'log4r'
 require 'vagrant'
 require 'vagrant/cli'
 
-# Enable logging if it is requested. We do this before
-# anything else so that all logs are visible.
-if ENV["VAGRANT_LOG"]
-  logger = Log4r::Logger.new("vagrant")
-  logger.outputters = Log4r::Outputter.stdout
-  logger.level = Log4r.const_get(ENV["VAGRANT_LOG"].upcase)
-  logger = nil
-end
-
 # Create a logger right away
 logger = Log4r::Logger.new("vagrant::bin::vagrant")
 logger.info("`vagrant` invoked: #{ARGV.inspect}")

lib/vagrant.rb

@@ -1,3 +1,14 @@
+# Enable logging if it is requested. We do this before
+# anything else so that we can setup the output before
+# any logging occurs.
+if ENV["VAGRANT_LOG"]
+  require 'log4r'
+  logger = Log4r::Logger.new("vagrant")
+  logger.outputters = Log4r::Outputter.stdout
+  logger.level = Log4r.const_get(ENV["VAGRANT_LOG"].upcase)
+  logger = nil
+end
+
 require 'pathname'
 require 'json'
 require 'i18n'