Bump github.com/mattermost/mattermost-server/v6 from 6.1.0 to 6.3.0 (#1686)

Bumps [github.com/mattermost/mattermost-server/v6](https://github.com/mattermost/mattermost-server) from 6.1.0 to 6.3.0.
- [Release notes](https://github.com/mattermost/mattermost-server/releases)
- [Changelog](https://github.com/mattermost/mattermost-server/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mattermost/mattermost-server/compare/v6.1.0...v6.3.0)

---
updated-dependencies:
- dependency-name: github.com/mattermost/mattermost-server/v6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

vendor/golang.org/x/sys/unix/syscall_darwin.go

@@ -159,8 +159,10 @@ func Pipe(p []int) (err error) {
 	}
 	var x [2]int32
 	err = pipe(&x)
-	p[0] = int(x[0])
-	p[1] = int(x[1])
+	if err == nil {
+		p[0] = int(x[0])
+		p[1] = int(x[1])
+	}
 	return
 }
 
@@ -430,8 +432,25 @@ func GetsockoptXucred(fd, level, opt int) (*Xucred, error) {
 	return x, err
 }
 
-func SysctlKinfoProcSlice(name string) ([]KinfoProc, error) {
-	mib, err := sysctlmib(name)
+func SysctlKinfoProc(name string, args ...int) (*KinfoProc, error) {
+	mib, err := sysctlmib(name, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	var kinfo KinfoProc
+	n := uintptr(SizeofKinfoProc)
+	if err := sysctl(mib, (*byte)(unsafe.Pointer(&kinfo)), &n, nil, 0); err != nil {
+		return nil, err
+	}
+	if n != SizeofKinfoProc {
+		return nil, EIO
+	}
+	return &kinfo, nil
+}
+
+func SysctlKinfoProcSlice(name string, args ...int) ([]KinfoProc, error) {
+	mib, err := sysctlmib(name, args...)
 	if err != nil {
 		return nil, err
 	}