added support for hiding of input to readline.lua

modules/library/readline.lua

@@ -1,4 +1,4 @@
-function readln()
+function readln(rC)
  local s,si="",E().sI or 1
  write("|")
  while true do
@@ -10,7 +10,7 @@ function readln()
    elseif ev[3] == 8 then
     if s:len()>0 then s=s:sub(1,-2) write("\127\127|") end
    elseif ev[3] > 31 and ev[3] < 127 then
-    s=s..string.char(ev[3]) write("\127"..string.char(ev[3]).."|")
+    s=s..string.char(ev[3]) write("\127"..(rC or string.char(ev[3])).."|")
    end
   end
   C.yield()