code: func IsValidSysctlName(name string) bool {
  	if len(name) > SysctlMaxLength {
  		return false
  	}
  	return sysctlRegexp.MatchString(name)
  }
docs: // IsValidSysctlName checks that the given string is a valid sysctl name,
  // i.e. matches SysctlFmt.