Import concrete NIO modules (#105)

* Import concrete NIO modules

# Motivation
We should import the correct NIO submodules instead of the umbrella.

# Modification
Fix up import statements

# Result
We are now importing the proper submodules

* Fix the timespec import

Author: FranzBusch

Package.swift

@@ -34,7 +34,8 @@ let package = Package(
         .target(
             name: "NIOSSH",
             dependencies: [
-                .product(name: "NIO", package: "swift-nio"),
+                .product(name: "NIOCore", package: "swift-nio"),
+                .product(name: "NIOConcurrencyHelpers", package: "swift-nio"),
                 .product(name: "NIOFoundationCompat", package: "swift-nio"),
                 .product(name: "Crypto", package: "swift-crypto"),
             ]
@@ -43,15 +44,17 @@ let package = Package(
             name: "NIOSSHClient",
             dependencies: [
                 "NIOSSH",
-                .product(name: "NIO", package: "swift-nio"),
+                .product(name: "NIOCore", package: "swift-nio"),
+                .product(name: "NIOPosix", package: "swift-nio"),
                 .product(name: "NIOConcurrencyHelpers", package: "swift-nio"),
             ]
         ),
         .target(
             name: "NIOSSHServer",
             dependencies: [
                 "NIOSSH",
-                .product(name: "NIO", package: "swift-nio"),
+                .product(name: "NIOCore", package: "swift-nio"),
+                .product(name: "NIOPosix", package: "swift-nio"),
                 .product(name: "NIOFoundationCompat", package: "swift-nio"),
                 .product(name: "Crypto", package: "swift-crypto"),
             ]
@@ -60,15 +63,17 @@ let package = Package(
             name: "NIOSSHPerformanceTester",
             dependencies: [
                 "NIOSSH",
-                .product(name: "NIO", package: "swift-nio"),
+                .product(name: "NIOCore", package: "swift-nio"),
+                .product(name: "NIOEmbedded", package: "swift-nio"),
                 .product(name: "Crypto", package: "swift-crypto"),
             ]
         ),
         .testTarget(
             name: "NIOSSHTests",
             dependencies: [
                 "NIOSSH",
-                .product(name: "NIO", package: "swift-nio"),
+                .product(name: "NIOCore", package: "swift-nio"),
+                .product(name: "NIOEmbedded", package: "swift-nio"),
                 .product(name: "NIOFoundationCompat", package: "swift-nio"),
             ]
         ),

Sources/NIOSSH/ByteBuffer+SSH.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import NIO
+import NIOCore
 
 extension ByteBuffer {
     /// Gets an SSH boolean field from a `ByteBuffer`.

Sources/NIOSSH/Child Channels/ChildChannelOptions.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import NIO
+import NIOCore
 
 /// The various channel options specific to `SSHChildChannel`s.
 ///

Sources/NIOSSH/Child Channels/ChildChannelUserEvents.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import NIO
+import NIOCore
 
 /// A namespace for SSH channel request events.
 public enum SSHChannelRequestEvent {

Sources/NIOSSH/Child Channels/SSHChannelData.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import NIO
+import NIOCore
 
 /// `SSHChannelData` is the data type that is passed around in `SSHChildChannel` objects.
 ///

Sources/NIOSSH/Child Channels/SSHChannelMultiplexer.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import NIO
+import NIOCore
 
 /// An object that controls multiplexing messages to multiple child channels.
 final class SSHChannelMultiplexer {

Sources/NIOSSH/Child Channels/SSHChannelType.swift

@@ -11,7 +11,7 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 //===----------------------------------------------------------------------===//
-import NIO
+import NIOCore
 
 /// `SSHChannelType` represents the type of a single SSH channel.
 ///

Sources/NIOSSH/Child Channels/SSHChildChannel.swift

@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-import NIO
 import NIOConcurrencyHelpers
+import NIOCore
 
 /// A NIO `Channel` that encapsulates a single SSH `Channel`.
 ///

Sources/NIOSSH/Connection State Machine/Operations/SendsChannelMessages.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import NIO
+import NIOCore
 
 // Right now this doesn't do that much, but we may use it in future for supporting re-keying.
 protocol SendsChannelMessages {

Sources/NIOSSH/Connection State Machine/Operations/SendsKeyExchangeMessages.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import NIO
+import NIOCore
 
 protocol SendsKeyExchangeMessages {
     var keyExchangeStateMachine: SSHKeyExchangeStateMachine { get set }