update process fail when github in maintenance

[hasslerf]

The -U Flag would normally overwrite the youtube-dl-Script by the latest version from github. When github is in maintenance it sends a 404-page which overwrites the youtube-dl-Script.

[FiloSottile]

Adding HTTP status check

[FiloSottile]

Umh... I can't replicate: If the update function hits a 404 (like http://github.com/sdcsckdjn) I get a ERROR: unable to download latest version and the script gets unaffected.

Suggestions on how to simulate the behavior?

[gcmalloc]

Add a rule to your host file that redirect http://github.com to your own webserver, then create a little webserver that only serv 500 error for any request.

[FiloSottile]

We changed our release system, and this should not happen anymore.