Abort connection attempt if IP address is 0

[MrCowKing]

I will use gfycat as an example here.

When performing a gallery download where multiple links can point to domains for dead services e.g. gfycat, this can dramatically increase the time to finish a gallery download. Normally, an easy solution to a program connecting to a dead service/URL is to add an entry to the hosts file or a local DNS caching service that points that URL to 0.0.0.0 (IPv4) or :: (IPv6). This should effectively tell the program that the domain name doesn't actually point anywhere and to abort the connection.

I figure this is an easier solution than writing something within Hydrus for a list of all the user entered URLs to blacklist connections to.