Rename solana-netutil to solana-net-utils for consistency (#6895)

* sed -i -e 's/netutil/net_utils/g' $(git grep --files-with-matches netutil :**.rs)

* sed -i -e 's/netutil/net-utils/g' $(git grep --files-with-matches netutil)

* git mv netutil/ net-utils

* Tweak a bit

* Fix rustfmt & clippy

net-utils/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "solana-net-utils"
+version = "0.21.0"
+description = "Solana Network Utilities"
+authors = ["Solana Maintainers <maintainers@solana.com>"]
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+homepage = "https://solana.com/"
+edition = "2018"
+
+[dependencies]
+bincode = "1.2.0"
+bytes = "0.4"
+clap = "2.33.0"
+log = "0.4.8"
+nix = "0.15.0"
+rand = "0.6.1"
+serde = "1.0.102"
+serde_derive = "1.0.102"
+socket2 = "0.3.11"
+solana-logger = { path = "../logger", version = "0.21.0" }
+tokio = "0.1"
+tokio-codec = "0.1"
+
+[lib]
+name = "solana_net_utils"
+
+[[bin]]
+name = "solana-ip-address"
+path = "src/bin/ip_address.rs"
+
+[[bin]]
+name = "solana-ip-address-server"
+path = "src/bin/ip_address_server.rs"