Commit 6c87537f60941f3c265c339fe60d1e31d2a42ccf

DRC 2023-07-03T10:25:24

AppVeyor: Use SignPath release cert/only sign tags The SignPath release certificate for our project is not yet available as of this writing, but this commit prepares the CI system to use the release certificate whenever it becomes available. It also restricts signing only to tags, which correspond to official releases. (That mimics our traditional policy of not signing pre-release builds.)