allow configure baseurl

[hurngchunlee]

dr-tools/internal/cmd/repocli/shell.go

Line 277 in 1efc86c

fmt.Fprintf(os.Stderr, "login for %s\n", davBaseURL)

Sometimes user sets a wrong URL before and at the moment, the only way to reset the baseurl is to remove the existing config file ~/.repocli.yml, which is not very convenient.