Fix https://github.com/go-gitea/gitea/pull/23894#discussion_r1573718690
(cherry picked from commit 2ad9ef4984f0b68ef38241fd6b557d8427d851d8)
Conflicts:
models/migrations/v1_16/v210.go
models/migrations/v1_22/v286.go
trivial conflicts because MSSQL is no longer supported
- It was only used to parse old U2F data to webauthn credentials. We
only used the public key and keyhandle. This functiontionality was
reworked to `parseU2FRegistration`.
- Tests are already present, `Test_RemigrateU2FCredentials`.
In PR #26786, the Go version for golangci-lint is bumped to 1.21. This
causes the following error:
```
models/migrations/v1_16/v210.go:132:23: SA1019: elliptic.Marshal has been deprecated since Go 1.21: for ECDH, use the crypto/ecdh package. This function returns an encoding equivalent to that of PublicKey.Bytes in crypto/ecdh. (staticcheck)
PublicKey: elliptic.Marshal(elliptic.P256(), parsed.PubKey.X, parsed.PubKey.Y),
```
The change now uses [func (*PublicKey)
ECDH](https://pkg.go.dev/crypto/ecdsa#PublicKey.ECDH), which is added in
Go 1.20.
The xorm `Sync2` has already been deprecated in favor of `Sync`,
so let's do the same inside the Gitea codebase.
Command used to replace everything:
```sh
for i in $(ag Sync2 --files-with-matches); do vim $i -c ':%sno/Sync2/Sync/g' -c ':wq'; done
```
Change all license headers to comply with REUSE specification.
Fix #16132
Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
