Upgrade passenger and its third-party modules for www/nginx and
www/nginx-devel from 5.3.3 to 5.3.4.

PR: 229392

<ChangeLog>

• Fixes a crash during startup on FreeBSD 11.2 and recent OpenBSD versions due to C++11 compatibility issues in the code. Closes GH-2097.
• Updates Boost to version 1.67.0.
• [Apache] Fixes the handling of HTTP requests with chunked bodies in combination with PassengerBufferUploads off. Closes GH-2102.

</ChangeLog>