Web.AsyncHTTP: Added TODO about async python3.

Author: mikoto2000

autoload/vital/__vital__/Web/AsyncHTTP.vim

@@ -110,6 +110,7 @@ function! s:_get_client(settings) abort
 endfunction
 
 " implements clients
+" TODO: Implement async python3 mechanism and add document.
 let s:clients = {}
 
 let s:clients.curl = {}

doc/vital/Web/AsyncHTTP.txt

@@ -201,6 +201,7 @@ Data structure as |Directory| like following.
 CLIENT					*Vital.Web.AsyncHTTP-client*
 
 The following can be used.
+(TODO: Implement async python3 mechanism and add document.)
 
 curl					*Vital.Web.AsyncHTTP-client-curl*
 	Use curl command.