Remote connect timeout is quite low and not configurable

[mattsains]

https://github.com/hashicorp/go-syslog/blob/master/builtin.go#L27

If a remote connection cannot be established in under 50 milliseconds, the syslog client returns an i/o timeout error in DialLogger.

There is no way to configure this timeout, and it's rather low especially if the syslog daemon is far away (eg., over the internet).

Suggestion: It would be good to be able to configure this timeout when calling DialLogger. I suppose to avoid breaking comsumers, a new Dial function would need to be introduced that supports passing configuration like this.