v3.4.0rc4

Like 3.4.0 (RC2) and additionally:

• Fix some regressions in RC2 (#661).
• Configurable binding host in Dockerfile (#660).

Thanks to the following contributors of this release: @GermanG, @jgrammen-agilitypr, @qhess34

(3.4.0 RC3 has been yanked, it's a broken release.)