Increase metrics default report frequency to 60sec.

- New default for maximum number of open database connections.

- Friend state indicators are no longer offset when sent to clients.

- Group state indicators are no longer offset when sent to clients.

- Increased metrics default report frequency to 60sec. 

### Fixed

- Correctly handle optional parameters in runtime functions to update account information.

// MetricsConfig is configuration relevant to metrics capturing and output.

type MetricsConfig struct {

	ReportingFreqSec     int    `yaml:"reporting_freq_sec" json:"reporting_freq_sec" usage:"Frequency of metrics exports. Default is 10 seconds."`

	ReportingFreqSec     int    `yaml:"reporting_freq_sec" json:"reporting_freq_sec" usage:"Frequency of metrics exports. Default is 60 seconds."`

	StackdriverProjectID string `yaml:"stackdriver_projectid" json:"stackdriver_projectid" usage:"This is the identifier of the Stackdriver project the server is uploading the stats data to. Setting this enables metrics to be exported to Stackdriver."`

	Namespace            string `yaml:"namespace" json:"namespace" usage:"Namespace for Prometheus or prefix for Stackdriver metrics. It will always prepend node name."`

	PrometheusPort       int    `yaml:"prometheus_port" json:"prometheus_port" usage:"Port to expose Prometheus. If '0' Prometheus exports are disabled."`

// NewMetricsConfig creates a new MatricsConfig struct.

func NewMetricsConfig() *MetricsConfig {

	return &MetricsConfig{

		ReportingFreqSec:     10,

		ReportingFreqSec:     60,

		StackdriverProjectID: "",

		Namespace:            "",

		PrometheusPort:       0,