Another timeout increase due to observing timeout issues on CI
SSLEngineProvider should now be used
Merge pull request #2830 from richdougherty/remove-unused-java-ssl-context

Remove unused SSLContextProvider class
Small doco improvements
Add a link to CSRF docs
Latest rjs documentation given changed behaviour.
Remove use of NotNull trait
Moved HeadAction to play.core.actions

Fixes #2861, ensures that there's no play.api.controllers package to
interfere with controllers imports.