Scalyr API server URL not documented

[femueller]

Line 627-628 defines the Scalyr server URL, but it's actually not documented:

https://github.com/scalyr/scalyr-tool/blob/master/scalyr#L627-L628

[czerwingithub]

We'll have an engineer add more documentation. Specifically, it should say that if you are using eu.scalyr.com that this should be set to https://eu.scalyr.com.

[oporkka]

Thanks! I ran into this issue yesterday myself.