Merge pull request #1775 from ChristopherDavenport/blazeBuilderDocs0.18

Adding Scaladoc for BlazeBuilder

blaze-server/src/main/scala/org/http4s/server/blaze/BlazeBuilder.scala

@@ -22,6 +22,35 @@ import scala.collection.immutable
 import scala.concurrent.{ExecutionContext, Future}
 import scala.concurrent.duration._
 
+/**
+  * BlazeBuilder is the component for the builder pattern aggregating
+  * different components to finally serve requests.
+  *
+  * Variables:
+  * @param socketAddress: Socket Address the server will be mounted at
+  * @param executionContext: Execution Context the underlying blaze futures
+  *    will be executed upon.
+  * @param idleTimeout: Period of Time a connection can remain idle before the
+  *    connection is timed out and disconnected.
+  *    Duration.Inf disables this feature.
+  * @param isNio2: Whether or not to use NIO2 or NIO1 Socket Server Group
+  * @param connectorPoolSize: Number of worker threads for the new Socket Server Group
+  * @param bufferSize: Buffer size to use for IO operations
+  * @param enableWebsockets: Enables Websocket Support
+  * @param sslBits: If defined enables secure communication to the server using the
+  *    sslContext
+  * @param isHttp2Enabled: Whether or not to enable Http2 Server Features
+  * @param maxRequestLineLength: Maximum request line to parse
+  *    If exceeded returns a 400 Bad Request.
+  * @param maxHeadersLen: Maximum data that composes the headers.
+  *    If exceeded returns a 400 Bad Request.
+  * @param serviceMounts: The services that are mounted on this server to serve.
+  *    These services get assembled into a Router with the longer prefix winning.
+  * @param serviceErrorHandler: The last resort to recover and generate a response
+  *    this is necessary to recover totality from the error condition.
+  * @param banner: Pretty log to display on server start. An empty sequence
+  *    such as Nil disables this
+  */
 class BlazeBuilder[F[_]](
     socketAddress: InetSocketAddress,
     executionContext: ExecutionContext,