This PR allows TLS 1.3, by removing the MaxVersion in the client config.
This would silently swallow errors, so e.g. a client without cert
dialing a server that requires client certs would lead to an error which
gets ignored, leading to retries until timeout.
In this PR, we wrap the connection and if an error occurs we send it to
the existing `result` channel.
I think this matches @jhump's comment in https://github.com/fullstorydev/grpcurl/issues/387#issuecomment-1517098394
**Testing**
```console
# Start the test server (in another tab)
go run ./internal/testing/cmd/testserver \
-cert internal/testing/tls/server.crt \
-key internal/testing/tls/server.key \
-cacert internal/testing/tls/ca.crt \
-requirecert -p 9999
# Old behavior
$ grpcurl -cacert internal/testing/tls/ca.crt \
localhost:9999 list
Failed to dial target host "localhost:9999": context deadline exceeded
# New behavior
$ go run ./cmd/grpcurl -cacert internal/testing/tls/ca.crt \
localhost:9999 list
Failed to dial target host "localhost:9999": remote error: tls: certificate required
exit status 1
```
The old behavior is to hang until we hit the deadline. The new behavior
is to return immediately with an error.
Fixes#563
Migrate from deprecated grpc.DialContext/WithBlock to grpc.NewClient
with connectivity state polling in BlockingDial. Add passthrough:///
scheme prefix for bare addresses to preserve resolver behavior.
* update to latest jhump/protoreflect
* be lenient when possible if server cannot furnish all dependencies
* move linting back to go 1.21 instead of latest go 1.22
* make staticcheck happy
* Enable xDS credentials
This change should be relatively straightforward. It is a noop outside of the
context of xDS (as demonstrated by the fact that the tests all pass), but it
enables xDS-provided certificates (i.e. the ones that would be
provided/specified in GRPC_XDS_BOOTSTRAP). See proposal
[A29](https://github.com/grpc/proposal/blob/master/A29-xds-tls-security.md#go)
for additional detail.
* Only enable xds credentials if the target is an xDS target
* Update after merge
* use wrapped TransportCredentials instead of handling handshake in Dialer, so that grpc library will use correct :scheme
* support -authority for TLS conns; now effectively supercedes -servername flag
* organize into multiple files
* make listing methods show fully-qualified names
* address small feedback from recent change (trim then check if empty)
* augments grpcurl package API in order to handle multiple formats
* deprecates old signature for InvokeRpc
* add command-line flag to use protobuf text format instead of JSON
* use AnyResolver when marshaling to/from JSON
