When the network listener is created with --transport mytcp and --threadpool
mypool it is simply referenced when the network listener is created. The user
has to create the transport and threadpool separately before he uses the listener .
Why not create the transport and threadpool if it doesn't exist in the
domain.xml and reference it, which will make the life easier for a developer who
wish to create a listener without bothering about so many other commands.
Ideally we should be doing this.
1. If the option is not specified use the default values
2. if the option is specified and and elements already exists in domain.xml
3. If the option is specified and the elements doesnot exists in domain.xml
create new transport/threadpool's elements and reference it.