Merge #11883: fix email examples by adding 'localhost' to SMTP constructor calls

Doc/includes/email-dir.py

@@ -105,7 +105,7 @@ must be running an SMTP server.
         fp.write(composed)
         fp.close()
     else:
-        s = smtplib.SMTP()
+        s = smtplib.SMTP('localhost')
         s.sendmail(opts.sender, opts.recipients, composed)
         s.quit()
 

Doc/includes/email-mime.py

@@ -26,6 +26,6 @@ for file in pngfiles:
     msg.attach(img)
 
 # Send the email via our own SMTP server.
-s = smtplib.SMTP()
+s = smtplib.SMTP('localhost')
 s.send_message(msg)
 s.quit()

Doc/includes/email-simple.py

@@ -18,6 +18,6 @@ msg['From'] = me
 msg['To'] = you
 
 # Send the message via our own SMTP server.
-s = smtplib.SMTP()
+s = smtplib.SMTP('localhost')
 s.send_message(msg)
 s.quit()