Change wording as requested by Kevin

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@81389 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_readexten.c

@@ -66,10 +66,10 @@ static char *descrip =
 "  filename  file to play before reading digits or tone with option i\n"
 "  context   context in which to match extensions\n"
 "  option    options are:\n"
-"              s - Return immediately if the line is not up,\n"
+"              s - Return immediately if the channel is not answered,\n"
 "              i - Play filename as an indication tone from your\n"
 "                  indications.conf\n"
-"              n - Read digits even if the line is not up.\n"
+"              n - Read digits even if the channel is not answered.\n"
 "  timeout   An integer number of seconds to wait for a digit response. If\n"
 "            greater than 0, that value will override the default timeout.\n\n"
 "ReadExten will set READEXTENSTATUS on exit with one of the following statuses:\n"