rebase: bump google.golang.org/grpc from 1.49.0 to 1.50.1

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.49.0 to 1.50.1.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.49.0...v1.50.1)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/google.golang.org/grpc/internal/binarylog/binarylog.go

@@ -37,7 +37,7 @@ type Logger interface {
 // binLogger is the global binary logger for the binary. One of this should be
 // built at init time from the configuration (environment variable or flags).
 //
-// It is used to get a methodLogger for each individual method.
+// It is used to get a MethodLogger for each individual method.
 var binLogger Logger
 
 var grpclogLogger = grpclog.Component("binarylog")
@@ -56,11 +56,11 @@ func GetLogger() Logger {
 	return binLogger
 }
 
-// GetMethodLogger returns the methodLogger for the given methodName.
+// GetMethodLogger returns the MethodLogger for the given methodName.
 //
 // methodName should be in the format of "/service/method".
 //
-// Each methodLogger returned by this method is a new instance. This is to
+// Each MethodLogger returned by this method is a new instance. This is to
 // generate sequence id within the call.
 func GetMethodLogger(methodName string) MethodLogger {
 	if binLogger == nil {
@@ -117,7 +117,7 @@ func (l *logger) setDefaultMethodLogger(ml *MethodLoggerConfig) error {
 
 // Set method logger for "service/*".
 //
-// New methodLogger with same service overrides the old one.
+// New MethodLogger with same service overrides the old one.
 func (l *logger) setServiceMethodLogger(service string, ml *MethodLoggerConfig) error {
 	if _, ok := l.config.Services[service]; ok {
 		return fmt.Errorf("conflicting service rules for service %v found", service)
@@ -131,7 +131,7 @@ func (l *logger) setServiceMethodLogger(service string, ml *MethodLoggerConfig)
 
 // Set method logger for "service/method".
 //
-// New methodLogger with same method overrides the old one.
+// New MethodLogger with same method overrides the old one.
 func (l *logger) setMethodMethodLogger(method string, ml *MethodLoggerConfig) error {
 	if _, ok := l.config.Blacklist[method]; ok {
 		return fmt.Errorf("conflicting blacklist rules for method %v found", method)
@@ -161,11 +161,11 @@ func (l *logger) setBlacklist(method string) error {
 	return nil
 }
 
-// getMethodLogger returns the methodLogger for the given methodName.
+// getMethodLogger returns the MethodLogger for the given methodName.
 //
 // methodName should be in the format of "/service/method".
 //
-// Each methodLogger returned by this method is a new instance. This is to
+// Each MethodLogger returned by this method is a new instance. This is to
 // generate sequence id within the call.
 func (l *logger) GetMethodLogger(methodName string) MethodLogger {
 	s, m, err := grpcutil.ParseMethod(methodName)
@@ -174,16 +174,16 @@ func (l *logger) GetMethodLogger(methodName string) MethodLogger {
 		return nil
 	}
 	if ml, ok := l.config.Methods[s+"/"+m]; ok {
-		return newMethodLogger(ml.Header, ml.Message)
+		return NewTruncatingMethodLogger(ml.Header, ml.Message)
 	}
 	if _, ok := l.config.Blacklist[s+"/"+m]; ok {
 		return nil
 	}
 	if ml, ok := l.config.Services[s]; ok {
-		return newMethodLogger(ml.Header, ml.Message)
+		return NewTruncatingMethodLogger(ml.Header, ml.Message)
 	}
 	if l.config.All == nil {
 		return nil
 	}
-	return newMethodLogger(l.config.All.Header, l.config.All.Message)
+	return NewTruncatingMethodLogger(l.config.All.Header, l.config.All.Message)
 }

vendor/google.golang.org/grpc/internal/binarylog/env_config.go

@@ -57,7 +57,7 @@ func NewLoggerFromConfigString(s string) Logger {
 	return l
 }
 
-// fillMethodLoggerWithConfigString parses config, creates methodLogger and adds
+// fillMethodLoggerWithConfigString parses config, creates TruncatingMethodLogger and adds
 // it to the right map in the logger.
 func (l *logger) fillMethodLoggerWithConfigString(config string) error {
 	// "" is invalid.

vendor/google.golang.org/grpc/internal/binarylog/method_logger.go

@@ -52,7 +52,9 @@ type MethodLogger interface {
 	Log(LogEntryConfig)
 }
 
-type methodLogger struct {
+// TruncatingMethodLogger is a method logger that truncates headers and messages
+// based on configured fields.
+type TruncatingMethodLogger struct {
 	headerMaxLen, messageMaxLen uint64
 
 	callID          uint64
@@ -61,8 +63,9 @@ type methodLogger struct {
 	sink Sink // TODO(blog): make this plugable.
 }
 
-func newMethodLogger(h, m uint64) *methodLogger {
-	return &methodLogger{
+// NewTruncatingMethodLogger returns a new truncating method logger.
+func NewTruncatingMethodLogger(h, m uint64) *TruncatingMethodLogger {
+	return &TruncatingMethodLogger{
 		headerMaxLen:  h,
 		messageMaxLen: m,
 
@@ -75,8 +78,8 @@ func newMethodLogger(h, m uint64) *methodLogger {
 
 // Build is an internal only method for building the proto message out of the
 // input event. It's made public to enable other library to reuse as much logic
-// in methodLogger as possible.
-func (ml *methodLogger) Build(c LogEntryConfig) *pb.GrpcLogEntry {
+// in TruncatingMethodLogger as possible.
+func (ml *TruncatingMethodLogger) Build(c LogEntryConfig) *pb.GrpcLogEntry {
 	m := c.toProto()
 	timestamp, _ := ptypes.TimestampProto(time.Now())
 	m.Timestamp = timestamp
@@ -95,11 +98,11 @@ func (ml *methodLogger) Build(c LogEntryConfig) *pb.GrpcLogEntry {
 }
 
 // Log creates a proto binary log entry, and logs it to the sink.
-func (ml *methodLogger) Log(c LogEntryConfig) {
+func (ml *TruncatingMethodLogger) Log(c LogEntryConfig) {
 	ml.sink.Write(ml.Build(c))
 }
 
-func (ml *methodLogger) truncateMetadata(mdPb *pb.Metadata) (truncated bool) {
+func (ml *TruncatingMethodLogger) truncateMetadata(mdPb *pb.Metadata) (truncated bool) {
 	if ml.headerMaxLen == maxUInt {
 		return false
 	}
@@ -129,7 +132,7 @@ func (ml *methodLogger) truncateMetadata(mdPb *pb.Metadata) (truncated bool) {
 	return truncated
 }
 
-func (ml *methodLogger) truncateMessage(msgPb *pb.Message) (truncated bool) {
+func (ml *TruncatingMethodLogger) truncateMessage(msgPb *pb.Message) (truncated bool) {
 	if ml.messageMaxLen == maxUInt {
 		return false
 	}