* gnu/packages/rust-apps.scm (sniffglue): Update to 0.15.0. [cargo-inputs]: Add rust-bstr-0.2. Replace rust-env-logger-0.8 with 0.9, rust-nix-0.20 with 0.23, rust-nom-6 with 7, rust-pktparse-0.5 with 0.7, rust-sha2-0.9 with 0.10, rust-syscallz-0.15 with 0.16, rust-tls-parser-0.11 with 0.12. [cargo-development-inputs]: Replace rust-boxxy-0.11 with 0.12.