Add a TODO about listing HashiCorp products

dosp-survey.ltx

@@ -268,6 +268,8 @@ SurrealDB & 2021-12-14 & rel. +4 years & Apache v2 & REF \\
 % https://github.com/surrealdb/surrealdb/blob/main/LICENSE
 
 Terraform (etc.) & 2023-08-10 & rel. +4 years & MPL 2.0 & REF \\
+% TODO Maybe we should list each individual HashiCorp product to which
+%      this relicensing applied, instead of the umbrella "etc."
 
 ZeroTier & 2019-08-28 & 5th cal. year & Apache v2 & REF \\
 \end{tabular}