Land rapid7#5690, fix URL generation for reverse_http

Author: HD Moore

lib/msf/core/payload/windows/reverse_http.rb

@@ -51,6 +51,7 @@ def generate(opts={})
 
     # Add extra options if we have enough space
     unless self.available_space.nil? || required_space > self.available_space
+      conf[:url]        = generate_uri
       conf[:exitfunk]   = datastore['EXITFUNC']
       conf[:ua]         = datastore['MeterpreterUserAgent']
       conf[:proxy_host] = datastore['PayloadProxyHost']