Version 17 plus test updates and OPK v17

This is the first public release of OPK v17.
See the file CHANGELOG.md for details.

util/test/test_sleep.cpp

@@ -58,6 +58,21 @@ void TestSleep::SyncFakeClock() {
   Sleep(0);
 }
 
+void TestSleep::SetFakeClock(int64_t time_seconds) {
+  if (real_sleep_) {
+    LOGE("SetFakeClock when using a real clock. Expect other failures.");
+  }
+  // Delta could be positive or negative. If the fake clock had been initialized
+  // by the current time on a real clock, and then the command line
+  // re-initializes it to 0, then delta is negative.
+  int64_t delta = time_seconds - Clock().GetCurrentTime();
+  if (callback_ != nullptr) {
+    callback_->ElapseTime(delta * 1000);
+  } else {
+    LOGE("Setting fake clock with no callback. This won't work.");
+  }
+}
+
 bool TestSleep::RollbackSystemTime(int seconds) {
   if (real_sleep_) {
 #ifdef _WIN32