feat: Add support for more TCP channel options (#607)

Author: jakubjanecek

http4s-server-blaze/src/main/scala/com/avast/sst/http4s/server/Http4sBlazeServerConfig.scala

@@ -27,6 +27,11 @@ object Http4sBlazeServerConfig {
 
   def localhost8080: Http4sBlazeServerConfig = Http4sBlazeServerConfig("127.0.0.1", 8080)
 
-  final case class SocketOptions(tcpNoDelay: Boolean = true)
+  final case class SocketOptions(
+      tcpNoDelay: Boolean = true,
+      soKeepAlive: Boolean = true,
+      soReuseAddr: Boolean = true,
+      soReusePort: Boolean = true
+  )
 
 }

http4s-server-blaze/src/main/scala/com/avast/sst/http4s/server/Http4sBlazeServerModule.scala

@@ -42,6 +42,9 @@ object Http4sBlazeServerModule {
           .withConnectorPoolSize(config.connectorPoolSize)
           .withMaxConnections(config.maxConnections)
           .withChannelOption[java.lang.Boolean](StandardSocketOptions.TCP_NODELAY, config.socketOptions.tcpNoDelay)
+          .withChannelOption[java.lang.Boolean](StandardSocketOptions.SO_KEEPALIVE, config.socketOptions.soKeepAlive)
+          .withChannelOption[java.lang.Boolean](StandardSocketOptions.SO_REUSEADDR, config.socketOptions.soReuseAddr)
+          .withChannelOption[java.lang.Boolean](StandardSocketOptions.SO_REUSEPORT, config.socketOptions.soReusePort)
           .resource
     } yield server
   }