If a call to `vcpkg_replace_string` makes no changes i.e doesn't
effectively replace a string, A warning is logged.
This should also help identify ports that no longer need these calls to
fix things in `.pc` files etc.
* Update HTTP to HTTPS links where it can be done safely.
This means that the HTTP-based link gave a 200 response with identical
content to the HTTPS version of the link. For links containing
variables, we checked the interpolated (real) link.
* Bump relevant vcpkg.json versions.
* Use version-date for cello.
* update version
Co-authored-by: Billy Robert O'Neal III <bion@microsoft.com>
Co-authored-by: Jonliu1993 <13720414433@163.com>
