New CLI arguments for session length and renewal

[ischolten]

For Influxdb oss, there are now two cli arguments that can be used for configuring the session. session-length specifies in minutes how long the session should be; its default is 60 (for 60 minutes). session-renewal-disabled specifies whether session renewal should be disabled; the default is false. If it is not disabled, every request will set the session's expiration time to five minutes from now. If it is disabled, after the amount of time specified by the session length occurs, the user will be redirected back to the login page.

Related to influxdata/influxdb#13924

[russorat]

@sanderson the pr has been merged