[$] HashiCorp, Terraform, and OpenTF

Over the years, there have been multiple examples of open-source softwarethat, suddenly, was no longer open source; on August10, some furtherexamples were added to the pile. That happened when HashiCorp announcedthat it would be switching the license on its products from the Mozilla PublicLicense2.0 (MPL) to the Business Source License1.1(BSL or BUSL). At least one of the products affected by the change, the Terraform infrastructure-automationtool, has attracted an effort to continue it as an open-source tool in theform of a fork that would be maintained by the nascent OpenTF Foundation. That seems like asensible reaction to the move, but it also helps serve up yet anotherreminder that code which is controlled by a single entity is normallyalways at risk of suchadverse changes.