Fix NSEdoc errors

1. All @table blocks must have an explicit @name
2. All @field blocks must have both a name and description

Also added some more information to the creds.States table description

nselib/ldap.lua

@@ -43,6 +43,7 @@ ERRORS = {
 
 --- Application constants
 -- @class table
+-- @name APPNO
 APPNO = {
   BindRequest = 0,
   BindResponse = 1,