MFH: r515085 r517939 r517942

audio/pulseaudio-module-xrdp: Update to 0.4

Relnotes: https://github.com/neutrinolabs/pulseaudio-module-xrdp/releases/tag/v0.4
Sponsored by: HAW International, Inc.

audio/pulseaudio-module-xrdp: improve audio redirection latency

by backporting from upstream. PulseAudio >= 12 become more strict.
This patch reduces network bandwidth and CPU usage of xrdp.

While here, set DIST_SUBDIR=xrdp for xrdp related ports.

Obtained from: https://github.com/neutrinolabs/pulseaudio-module-xrdp/pull/38

Update distinfo I missed in the previous commit r517939

Approved by: portmgr blanket (backport reliability fixes)