Fix broken links in rustdocs

[Serock3]

I ran cargo doc and fixed as many broken links as I could find.

Fixes DES-899.

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This change is 

[linear]

DES-899 Fix broken links in our rustdoc

[MarkusPettersson98]

Reviewed 21 of 21 files at r1, all commit messages.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @Serock3)

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mullvad-management-interface/src/client.rs line 613 at r1 (raw file):

    /// - `access_method`: If `Some(access_method)`, `AccessModeSelector` will skip ahead and return
    ///   `access_method` when asked for a new access method. If `None`, `AccessModeSelector` will
    ///   pick the next access method "randomly"

Nit: This part of the comment feels very weird :s Feel free to remove it

Code quote:

    ///
    /// - `access_method`: If `Some(access_method)`, `AccessModeSelector` will skip ahead and return
    ///   `access_method` when asked for a new access method. If `None`, `AccessModeSelector` will
    ///   pick the next access method "randomly"

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talpid-types/src/net/proxy.rs line 237 at r1 (raw file):

/// List of ciphers usable by a Shadowsocks proxy.
/// Cf. `mullvad_daemon::migrations::v7::cipher`.

I don't think this link is correct anymore. We refer to something that was removed in a migration, and without that source material I think we should remove this part of the comment 😊

Code quote:

/// Cf. `mullvad_daemon::migrations::v7::cipher`.

[Serock3]

Reviewable status: 19 of 21 files reviewed, 1 unresolved discussion (waiting on @MarkusPettersson98)

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talpid-types/src/net/proxy.rs line 237 at r1 (raw file):

Previously, MarkusPettersson98 (Markus Pettersson) wrote…

I don't think this link is correct anymore. We refer to something that was removed in a migration, and without that source material I think we should remove this part of the comment 😊

Done.

[MarkusPettersson98]

Reviewed 2 of 2 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved