seastar dropped the dependency to Crypto++, and it also removed
Findcryptopp.cmake from its `cmake` directory. but scylladb still
depends on this library. and it has been using the `Findcryptopp.cmake`
in seastar submodule for finding it.
after the removal of this file, scylladb would not be able to
use it anymore. so, we have to provide our own `Findcryptopp.cmake`.
Findcryptopp.cmake is copied from the Seastar project. So its
date of copyright is preserved. and it was licensed under Apache 2.0,
since we are creating a derivative work from it. let's relicense
it under Apache 2.0 and AGPL 3.0 or later.
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
Closesscylladb/scylladb#16601
2508d33946