Add service option initially implemented by @maishsk

[frezbo]

This is a feature enhance to #278 by @maishsk. Thanks a lot for the idea. I tested this both in commercial and gov-cloud region and seems to work like a charm. This also takes cares of the region issue as per #285 .

[mtibben]

Seems like most, but not all, AWS services have the URL form https://{host}/{service}/home, though /{service} seems to redirect

Is --service right here, or would something like --url-path be clearer about what this is for? It's possible to deep link into a particular URL in aws web console using this flag too, which service doesn't capture

[frezbo]

@mtibben so you want service along with --url-path for nested services. BTW nice idea. I will try to see if I can spend some time on this.

[mtibben]

I was thinking just --url-path (or maybe just --path), no need for --service because something like --path=ec2 redirects to the right place anyway

[frezbo]

@mtibben I have updated service to path

[maishsk]

👍
LGTM