<ChangeLog>
*) Feature: reworked IPC between the router process and the applications
to lower latencies, increase performance, and improve scalability.
*) Feature: support for an arbitrary number of wildcards in route
matching patterns.
*) Feature: chunked transfer encoding in proxy responses.
*) Feature: basic variables support in the "pass" option.
*) Feature: compatibility with PHP 8 Beta 1. Thanks to Remi Collet.
*) Bugfix: the router process could crash while passing requests to an
application under high load.
*) Bugfix: a number of language modules failed to build on some systems;
the bug had appeared in 1.18.0.
*) Bugfix: time in error log messages from PHP applications could lag.
*) Bugfix: reconfiguration requests could hang if an application had
failed to start; the bug had appeared in 1.18.0.
*) Bugfix: memory leak during reconfiguration.
*) Bugfix: the daemon didn't start without language modules; the bug had
appeared in 1.18.0.
*) Bugfix: the router process could crash at exit.
*) Bugfix: Node.js applications could crash at exit.
*) Bugfix: the Ruby module could be linked against a wrong library
version.
</ChangeLog>
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