doc: add note about timeout delay > TIMEOUT_MAX

When setTimeout() and setInterval() are called with `delay` greater than
TIMEOUT_MAX (2147483647), the supplied value is ignored and 1 is used
instead. Add a note about this in the timers docs.

PR-URL: https://github.com/nodejs/node/pull/3512
Reviewed-By: Trevor Norris <trev.norris@gmai.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

doc/api/timers.markdown

@@ -16,6 +16,10 @@ It is important to note that your callback will probably not be called in exactl
 the callback will fire, nor of the ordering things will fire in. The callback will
 be called as close as possible to the time specified.
 
+To follow browser behavior, when using delays larger than 2147483647
+milliseconds (approximately 25 days) or less than 1, the timeout is executed
+immediately, as if the `delay` was set to 1.
+
 ## clearTimeout(timeoutObject)
 
 Prevents a timeout from triggering.
@@ -26,6 +30,10 @@ To schedule the repeated execution of `callback` every `delay` milliseconds.
 Returns a `intervalObject` for possible use with `clearInterval()`. Optionally
 you can also pass arguments to the callback.
 
+To follow browser behavior, when using delays larger than 2147483647
+milliseconds (approximately 25 days) or less than 1, Node.js will use 1 as the
+`delay`.
+
 ## clearInterval(intervalObject)
 
 Stops an interval from triggering.