Uppercase letters in public base url domain causes problems in APIcast and Openshift

If an upper case letter is used in a public base url domain (eg. FOOBAR.example.com) it can cause 2 different problems.

1. When zync attempts to create the route, Openshift will reject the route with the following message

host must conform to DNS 952 subdomain conventions

2. APIcast fails to match requests coming in due to the host being set to lowercase.

2020/07/22 21:04:35 [warn] 25#25: *84 host_based_finder.lua:20: find_service(): service not found for host foobar.example.com, requestID=4f60418384f3e0a0ebad5006ab15c872, client: 10.1.2.3, server: _, request: "GET / HTTP/1.1", host: "foobar.example.com"

Due to this, the UI should prevent entering uppercase letters in the domain, or system should automatically set them to lowercase when submitted.