Improve captcha blocking alert wording

src/ejabberd_captcha.erl

@@ -101,8 +101,8 @@ create_captcha(SID, From, To, Lang, Limiter, Args) ->
 		mk_ocr_field(Lang, CID, Type)],
 	  X = #xdata{type = form, fields = Fs},
 	  Captcha = #xcaptcha{xdata = X},
-	  BodyString = {<<"Your messages to ~s are being blocked. "
-			  "To unblock them, visit ~s">>, [JID, get_url(Id)]},
+          BodyString = {<<"Your subscription request and/or messages to ~s have been blocked. "
+		          "To unblock your subscription request, visit ~s">>, [JID, get_url(Id)]},
 	  Body = xmpp:mk_text(BodyString, Lang),
 	  OOB = #oob_x{url = get_url(Id)},
 	  Hint = #hint{type = 'no-store'},