Formalize d8e7bd3 as a versioned release

[ms5984]

Goal: Formalize d8e7bd3 as tagged release 1.9.5 or other suitable revision.

Caveats:

• Tagged release 1.9.4 is also currently missing; this may be a blocker.

[ms5984]

Patched and formalized 38e4913 as tag 1.9.4 on branch release/1.9.4