Badges can't be added from http:// or private IP address?
### Summary
Adding a URL such as
```
http://192.168.1.104:8010/badges/dev-linux.svg
```
Fails to load image preview or allow setting from Project Settings/General/Badge interface. I tried this in both EE and CE.
### Steps to reproduce
1. Go to Project / Settings / General / Badges
2. Enter URL and Image URL
```
http://192.168.1.104:8010/#/builders/%{project_id}
http://192.168.1.104:8010/badges/dev-linux.svg
```
### What is the current *bug* behavior?
Fails to set badge, so I have to embedded image into README.md as a work around for now.
### What is the expected *correct* behavior?
This should work for a LAN environment for projects not for external development.
#### Results of GitLab environment info
11.4.3-ee (gitlab-ce@dce6f33d6514170150fabdfd3b172071c0b73edd)
issue