libtls13: Adjust the newly added DER decoder tests

Add location information to decoded ASN.1 values

Compare against an actual OID in sigalg.decodeRsaPssPublicKey

Decode extnValue with DER unless told not to

Tolerate a non-DER encoding of extnValue

Fix typos and other suspicious stuff found by luacheck

Merge pull request #21 from yaxitech/typos

tls13/rsa: fix arguments for `makePublicKeyFromBytes`

tls13/x509: fix typo in RSASSA-PSS `trailerField` parsing

Check signature algorithm parameters for equality

Rename x509.sigalg to x509.alg to better reflect its contents

Recognize the SHA2 family of algorithms when parsing X.509

Clarify licensing terms

libtls13: Ensure scalarMul's correctness with Z3

libtls13: Implement Ed25519 signature generation