add support for musl platform

Author: johnnzhou

Sources/WebSocketKit/WebSocket+SocketOptions.swift

@@ -1,17 +1,25 @@
 import Foundation
 import NIOCore
 
+#if canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
+import Glibc
+#elseif canImport(Musl)
+import Musl
+#endif
+
 extension NIOBSDSocket.Option {
     #if canImport(Darwin)
     public static let ip_bound_if: NIOBSDSocket.Option = Self(rawValue: IP_BOUND_IF)
     public static let ipv6_bound_if: NIOBSDSocket.Option = Self(rawValue: IPV6_BOUND_IF)
-    #elseif canImport(Glibc)
+    #elseif canImport(Glibc) || canImport(Musl)
     public static let so_bindtodevice = Self(rawValue: SO_BINDTODEVICE)
     #endif
 }
 
 extension SocketOptionProvider {
-    #if canImport(Glibc)
+    #if canImport(Glibc) || canImport(Musl)
     /// Sets the socket option SO_BINDTODEVICE to `value`.
     ///
     /// - parameters:

Sources/WebSocketKit/WebSocketClient.swift

@@ -181,7 +181,7 @@ public final class WebSocketClient: Sendable {
                         default:
                             return channel.eventLoop.makeFailedFuture(WebSocketClient.Error.invalidAddress)
                         }
-                        #elseif canImport(Glibc)
+                        #elseif canImport(Glibc) || canImport(Musl)
                         return (channel as! SocketOptionProvider).setBindToDevice(device.name)
                         #endif
                     } else {