Datadog Profiler module

[XVII]

The datadog profiler component is a sibling to the ddtrace component that's already in this helper library.

The full doco for PHP integration is here: https://docs.datadoghq.com/tracing/trace_collection/automatic_instrumentation/dd_libraries/php/

Specifically, --enable-profiling (datadog-profiling extension) turns this on, though I'm not sure how it's intended to be used from the PECL package.

• https://github.com/DataDog/dd-trace-php
• https://github.com/DataDog/dd-trace-php/blob/master/profiling/datadog-profiling-install.sh

Not sure if it's worth doing appsec at the same time?

[Teko012]

@mlocati Can we transition away from PECL to the official installation method? It seems like PECL lags behind in versions and functionality.