PC-BSD/trueos 6d172a8release release-trueos.sh, release/manifests trueos-master.json

Fix an issue where the essential packages check wasn't causing the build
to abort properly if it failed.

While here, set x11/sddm as essential and also enable PULSE for openal-soft
which fixes minecraft recording with obsstudio
DeltaFile
+6-3release/manifests/trueos-master.json
+3-0release/release-trueos.sh
+9-32 files

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