We dropped the httpBindingRef in http common and servlet component some time back. The Servlet Component had a regression where it wasn't taking into consideration a custom httpBinding, and instead always initialized a default instance of **ServletRestHttpBinding, thereby ignoring the custom config.
This change now takes into effect user's custom httpBinding.

We have customers highlighting that their custom httpBinding configuration is never taken into consideration.

Upstream camel ticket: https://issues.apache.org/jira/browse/CAMEL-12785