add some comments around win32-process

We are just leaving some breadcrumbs here and there so that we know
why/when/where it is needed/used.

lib/vagrant-sshfs.rb

@@ -4,8 +4,10 @@
   raise "The Vagrant sshfs plugin must be run within Vagrant"
 end
 
-# Only load the gem on Windows since it replaces some methods in Ruby's Process class
-# Also load before Process.uid is called the first time by Vagrant
+# Only load the gem on Windows since it replaces some methods in Ruby's 
+# Process class. Also load it here before Process.uid is called the first 
+# time by Vagrant. The Process.create() function actually gets used in
+# lib/vagrant-sshfs/cap/linux/sshfs_mount.rb
 if Vagrant::Util::Platform.windows?
   require 'win32/process'
 end

lib/vagrant-sshfs/cap/linux/sshfs_mount.rb

@@ -2,6 +2,13 @@
 require "vagrant/util/retryable"
 require "tempfile"
 
+# This is already done for us in lib/vagrant-sshfs.rb. We needed to
+# do it there before Process.uid is called the first time by Vagrant
+# This provides a new Process.create() that works on Windows.
+if Vagrant::Util::Platform.windows?
+  require 'win32/process'
+end
+
 module VagrantPlugins
   module GuestLinux
     module Cap