Merge ~pwlars/testflinger-cli:fix-server-no-http into testflinger-cli:master

[Paul Larson]

Jeff pointed out that if you specify a server, but forget to put http:// or https:// in front of it, it gives you a big ugly traceback instead of something helpful. This fixes that.

[Sheila Miguez (codersquid)]

lgtm

review: Approve

[Jeff Lane  (bladernr)]

Thanks for fixing that!

review: Approve

diff --git a/testflinger_cli/__init__.py b/testflinger_cli/__init__.py
index 563b2dd..f8aae93 100644
--- a/testflinger_cli/__init__.py
+++ b/testflinger_cli/__init__.py
@@ -40,6 +40,8 @@ def cli(ctx, server):
     env_server = os.environ.get('TESTFLINGER_SERVER')
     if env_server:
         server = env_server
+    if not server.startswith(('http://','https://')):
+        raise SystemExit('Server must start with "http://" or "https://"')
     ctx.obj['conn'] = client.Client(server)