Add multiple recipients capability in doc.

diff --git a/smtpt b/smtpt
index 5021c71..9eb989b 100755 (executable)
--- a/smtpt
+++ b/smtpt
@@ -125,7 +125,8 @@ sub usage {
 ARGUMENTS:
  --host=HOST            the host to connect to
  --from=FROM            the sender email
- --to=TO                the recipient email
+ --to=TO                the recipient email (use it multiple time for more than
+                        one recipient)
  --spam=SPAM_COUNT      the number of spam emails to sent
  --virus=VIRUS_COUNT    the number of virus emails to sent
  --normal=NORMAL_COUNT  the number of nonspam/nonvirus emails to sent
@@ -259,7 +260,7 @@ The sender email.
 
 =head2 B<--to>=I<TO>
     
-The recipient email.
+The recipient email. (use it multiple time to specify more than one recipient)
 
 =head2 B<--spam>=I<SPAM_COUNT>