Node.js agent v2.6.1

Improvements

• Added regression test for promise instrumentation and stack overflows.

Bug fixes

• Fixed naming bug in Restify instrumentation regarding parameters to next.

  The instrumentation previously considered any truthy value passed to next to be an error. It is possible to pass a string or boolean to next in Restify to control further routing of the request. This would cause the middleware's mounting path to be erroneously appended to the transaction name.

• Fixed access to bluebird.coroutine.addYieldHandler.

  This was accidentally not copied by our instrumentation making access to the function fail. This has been resolved and tests expanded to ensure no other properties were missed.