Update Http mixin for opts[:ssl]

1. Add opts[:ssl]
2. Remove opts[:busybox]
3. Refactor logic
4. Remove resource_uri

Author: wvu

lib/msf/core/exploit/cmdstager/http.rb

@@ -15,28 +15,17 @@ def initialize(info = {})
   end
 
   def start_service(opts = {})
-    if opts[:busybox] && (ssl = datastore['SSL'])
-      datastore['SSL'] = false
-    end
+    datastore_ssl = datastore['SSL']
+    datastore['SSL'] = !!opts[:ssl]
 
     super
-    payload_uri = get_uri
 
-    if ssl
-      datastore['SSL'] = true
-    end
+    payload_uri = get_uri
+    datastore['SSL'] = datastore_ssl
 
     payload_uri
   end
 
-  def resource_uri
-    if (datastore['URIPATH'] || '').end_with?(?/)
-      random_uri
-    else
-      super
-    end
-  end
-
   def on_request_uri(cli, request)
     if request['User-Agent'] =~ /^(?:Wget|curl)/
       send_response(cli, exe)