Wrap oboe_log with a custom function to support multiple versions of the php-oboe library.  Add fourth parameter to re-enable backlog tracking.

Issue #1956836 by Eronarn: Updated module names and descriptions due to the Tracelytics to TraceView name change.

Issue #1815014 by Eronarn, pdrake: Resolve fatal error which occurs during fast cache page return.  Comment and code style cleanup.

Add fallback to register drupal_page_callback layer exit in hook_exit if layer has not already exited.