Break out check_external_links into a command-line flag or subcommand

[Freaky]

check_external_links is very expensive, and isn't even recommended to be left on even in the docs. I think it would be more practical as either a run-time argument to build, or ideally as its own subcommand.

It's also quite frustrating for it to just stop on the first error, necessitating running it repeatedly, particularly when using the command for the first time.

[Freaky]

Also: Reason: Link https://crates.io/crates/rand is not valid: 404 Not Found

I think this was an Accept-Content thing.

[Freaky]

Also: Reason: Link https://crates.io/crates/rand is not valid: 404 Not Found

I think this was an Accept-Content thing.

[Keats]

For crates.io: I mentioned it on the post for 0.4 but it behaves badly and always return 404. I'm tempted to replace my crates.io use with https://crates.rs/

It's also quite frustrating for it to just stop on the first error, necessitating running it repeatedly, particularly when using the command for the first time.

I agree this should be improved, instead of stopping at one error it should check all links and report all the ones not working. The issue is that it is currently part of the rendering which stops when it sees an error.

I'm not sure about having a separate command for that but i like the flag idea

[Keats]

For crates.io: I mentioned it on the post for 0.4 but it behaves badly and always return 404. I'm tempted to replace my crates.io use with https://crates.rs/

It's also quite frustrating for it to just stop on the first error, necessitating running it repeatedly, particularly when using the command for the first time.

I agree this should be improved, instead of stopping at one error it should check all links and report all the ones not working. The issue is that it is currently part of the rendering which stops when it sees an error.

I'm not sure about having a separate command for that but i like the flag idea