This doesn't even change behavior. Unlike local configuration, the peer
can never have multiple certificates anyway. (Even with a renego, the
SESS_CERT is created anew.)
This does lose the implicit certificate type check, but the certificate
type is already checked in ssl3_get_server_certificate and later checked
post-facto in ssl3_check_cert_and_algorithm (except that one seems to
have some bugs like it accepts ECDSA certificates for RSA cipher suites,
to be cleaned up in a follow-up). Either way, we have the certificate
mismatch tests for this.
BUG=486295
Change-Id: I437bb723bb310ad54ee4150eda67c1cfe43377b3
Reviewed-on: https://boringssl-review.googlesource.com/5044
Reviewed-by: Adam Langley <agl@google.com>