Protect against slow read attack

Right now as long as an attacker continutes to
do a slow read, the connection will stay open forever.
Set a timeout so this can't happen.

Tested: Used slowhttptest to verify this wouldn't
happen

Change-Id: I4dbe2a18f9ccce0ba36875572ec3df6bf3be6a1e
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/http/timer_queue.h b/http/timer_queue.h
index 7339d66..d7a427e 100644
--- a/http/timer_queue.h
+++ b/http/timer_queue.h
@@ -11,6 +11,9 @@
 {
 namespace detail
 {
+
+constexpr const size_t timerQueueTimeoutSeconds = 5;
+
 // fast timer queue for fixed tick value.
 class TimerQueue
 {
@@ -49,7 +52,8 @@
             // remove canceled ones immediately
             if (x.second)
             {
-                if (now - x.first < std::chrono::seconds(5))
+                if (now - x.first <
+                    std::chrono::seconds(timerQueueTimeoutSeconds))
                 {
                     break;
                 }