rebase: update k8s.io/mount-utils to current master

kubernetes/kubernetes#111083 has been merged and synced into
k8s.io/mount-utils. This should remove any systemd log messages while
calling NodeStageVolume and NodeGetVolumeStats.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

vendor/github.com/go-logr/logr/README.md

@@ -105,14 +105,18 @@ with higher verbosity means more (and less important) logs will be generated.
 There are implementations for the following logging libraries:
 
 - **a function** (can bridge to non-structured libraries): [funcr](https://github.com/go-logr/logr/tree/master/funcr)
+- **a testing.T** (for use in Go tests, with JSON-like output): [testr](https://github.com/go-logr/logr/tree/master/testr)
 - **github.com/google/glog**: [glogr](https://github.com/go-logr/glogr)
 - **k8s.io/klog** (for Kubernetes): [klogr](https://git.k8s.io/klog/klogr)
+- **a testing.T** (with klog-like text output): [ktesting](https://git.k8s.io/klog/ktesting)
 - **go.uber.org/zap**: [zapr](https://github.com/go-logr/zapr)
 - **log** (the Go standard library logger): [stdr](https://github.com/go-logr/stdr)
 - **github.com/sirupsen/logrus**: [logrusr](https://github.com/bombsimon/logrusr)
 - **github.com/wojas/genericr**: [genericr](https://github.com/wojas/genericr) (makes it easy to implement your own backend)
 - **logfmt** (Heroku style [logging](https://www.brandur.org/logfmt)): [logfmtr](https://github.com/iand/logfmtr)
 - **github.com/rs/zerolog**: [zerologr](https://github.com/go-logr/zerologr)
+- **github.com/go-kit/log**: [gokitlogr](https://github.com/tonglil/gokitlogr) (also compatible with github.com/go-kit/kit/log since v0.12.0)
+- **bytes.Buffer** (writing to a buffer): [bufrlogr](https://github.com/tonglil/buflogr) (useful for ensuring values were logged, like during testing)
 
 ## FAQ
 

vendor/github.com/go-logr/logr/logr.go

@@ -43,7 +43,9 @@ limitations under the License.
 //
 // Info() and Error() are very similar, but they are separate methods so that
 // LogSink implementations can choose to do things like attach additional
-// information (such as stack traces) on calls to Error().
+// information (such as stack traces) on calls to Error(). Error() messages are
+// always logged, regardless of the current verbosity.  If there is no error
+// instance available, passing nil is valid.
 //
 // Verbosity
 //
@@ -53,6 +55,7 @@ limitations under the License.
 // Log-lines with V-levels that are not enabled (as per the LogSink) will not
 // be written.  Level V(0) is the default, and logger.V(0).Info() has the same
 // meaning as logger.Info().  Negative V-levels have the same meaning as V(0).
+// Error messages do not have a verbosity level and are always logged.
 //
 // Where we might have written:
 //   if flVerbose >= 2 {
@@ -112,6 +115,15 @@ limitations under the License.
 // may be any Go value, but how the value is formatted is determined by the
 // LogSink implementation.
 //
+// Logger instances are meant to be passed around by value. Code that receives
+// such a value can call its methods without having to check whether the
+// instance is ready for use.
+//
+// Calling methods with the null logger (Logger{}) as instance will crash
+// because it has no LogSink. Therefore this null logger should never be passed
+// around. For cases where passing a logger is optional, a pointer to Logger
+// should be used.
+//
 // Key Naming Conventions
 //
 // Keys are not strictly required to conform to any specification or regex, but
@@ -253,11 +265,13 @@ func (l Logger) Info(msg string, keysAndValues ...interface{}) {
 // Error logs an error, with the given message and key/value pairs as context.
 // It functions similarly to Info, but may have unique behavior, and should be
 // preferred for logging errors (see the package documentations for more
-// information).
+// information). The log message will always be emitted, regardless of
+// verbosity level.
 //
 // The msg argument should be used to add context to any underlying error,
 // while the err argument should be used to attach the actual error that
-// triggered this log line, if present.
+// triggered this log line, if present. The err parameter is optional
+// and nil may be passed instead of an error instance.
 func (l Logger) Error(err error, msg string, keysAndValues ...interface{}) {
 	if withHelper, ok := l.sink.(CallStackHelperLogSink); ok {
 		withHelper.GetCallStackHelper()()