Fixed misleading log when server_name is '0.0.0.0'

[lamhoangtung]

Description

Assuming I have this script:

import gradio as gr
demo = gr.Blocks(title="Test")
demo.launch(server_name='0.0.0.0', server_port=4567)

Currently, running this with gradio 3.2 produce this log:

Running on local URL:  http://localhost:4567/

To create a public link, set `share=True` in `launch()`.

But this is misleading to user since localhost is often associated to 127.0.0.1 and the log should say this instead:

Running on local URL:  http://0.0.0.0:4567/

This small PR basically fixed this misleading log

Checklist:

• I have performed a self-review of my own code
• My code follows the style guidelines of this project
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[abidlabs]

Thanks for the PR @lamhoangtung! I agree with the point about what should be printed, but removing the url_host_name isn't a good idea because of the issue on Windows machine described in #382.

But we can modify what we print to be clearer. Let me push a fix here and merge it in.

[lamhoangtung]

That made a lot more sense to me why it was localhost before. Glad that I will be fixed soon. Thanks @abidlabs

[abidlabs]

I've made some changes. Would you be able to try them out @lamhoangtung? If they work for you as well, I'll go ahead and merge these in

[lamhoangtung]

LGTM. Working fine on my local machine as well @abidlabs

[abidlabs]

Thanks @lamhoangtung, merging. Will issue a patch release to pypi sometime next week!