##### SUMMARY
The `broadcast` address contains `global` in a Debian container running on Fedora.

I could not reproduce this when the Ansible controller runs on Mac OS X.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
setup

##### ANSIBLE VERSION
```
ansible 2.8.4
  config file = /Users/yf30lg/.ansible.cfg
  configured module search path = [u'/Users/yf30lg/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /Library/Python/2.7/site-packages/ansible
  executable location = /usr/local/bin/ansible
  python version = 2.7.10 (default, Feb 22 2019, 21:55:15) [GCC 4.2.1 Compatible Apple LLVM 10.0.1 (clang-1001.0.37.14)]
```

##### CONFIGURATION
```
# no output
```

##### OS / ENVIRONMENT
Controller: Fedora 31
Targets:
- Debian stable (container debian:stable)
- Fedora 31 (container fedora:lastest)

##### STEPS TO REPRODUCE

Prepare the container:
```
docker run -ti debian:stable /bin/bash
apt-get update
apt-get install -y python
```

Get the facts:
```
ansible -m setup -i $(docker ps -ql), -c docker all
```

##### EXPECTED RESULTS
I was hoping to get the broadcast address back, instead of a word `global`.

##### ACTUAL RESULTS

```
...
        "ansible_default_ipv4": {
...
            "broadcast": "global", 
...
```
data = {}
        ethtool_path = self.module.get_bin_path("ethtool")
        
        if ethtool_path:
            args = [ethtool_path, '-k', device]
            rc, stdout, stderr = self.module.run_command(args, errors='surrogate_then_replace')
            
            if rc == 0:
                features = {}
                for line in stdout.strip().splitlines():
                    if not line or line.endswith(":"):
                        continue
                    key, value = line.split(": ")
                    if not value:
                        continue
                    features[key.strip().replace('-', '_')] = value.strip()
                data['features'] = features
            args = [ethtool_path, '-T', device]
            rc, stdout, stderr = self.module.run_command(args, errors='surrogate_then_replace')
            if rc == 0:
                data['timestamping'] = [m.lower() for m in re.findall(r'SOF_TIMESTAMPING_(\w+)', stdout)]
                data['hw_timestamp_filters'] = [m.lower() for m in re.findall(r'HWTSTAMP_FILTER_(\w+)', stdout)]
                m = re.search(r'PTP Hardware Clock: (\d+)', stdout)
                if m:
                    data['phc_index'] = int(m.groups()[0])
        return data
class LinuxNetworkCollector(NetworkCollector):