Terminating a thread (which is blocking)

[Timothy Foster via Digitalmars-d-learn]

I've started a thread at the beginning of my program that waits 
for user input:

`thread = new Thread(&checkInput).start;`

`static void checkInput(){
     foreach (line; stdin.byLineCopy) { ... }
}`

I need to stop checking for user input at some point in my 
program but I'm not sure how to kill this thread. 
`thread.yield();` called from my main thread doesn't kill it and 
I'm not sure how to send a message to the input checking thread 
to get it to terminate itself when `stdin.byLineCopy` just sits 
there and blocks until user input is received.