[Sir_Substance]

I've always been a fan of the sqlite licence: https://sqlite.org/copyright.html

Basically sqlite is public domain if your country recognizes that kind of thing. If it doesn't, then sqlite doesn't care and will never pursue you. However, if /you/ care, sqlite will sell you licence. This licence costs $6000, looks very official and shiny and whatnot, covers all your bases as if public domain did exist in your country, and sqlite uses the money to continue funding development.

I'd be inclined to do something very similar with an additional clause stating that if dedicating to the public domain doesn't free me from liability, then see $6000 licence. (I thought sqlite had this, but either they've removed it or I misremember).