MINOR: Fixed a couple of typos in Config docs

Author: Mickael Maison <mickael.maison@gmail.com>

Reviewers: Gwen Shapira

Closes #6259 from mimaison/config-typos

clients/src/main/java/org/apache/kafka/clients/producer/ProducerConfig.java

@@ -192,7 +192,7 @@ public class ProducerConfig extends AbstractConfig {
             + " Note that this retry is no different than if the client resent the record upon receiving the error."
             + " Allowing retries without setting <code>" + MAX_IN_FLIGHT_REQUESTS_PER_CONNECTION + "</code> to 1 will potentially change the"
             + " ordering of records because if two batches are sent to a single partition, and the first fails and is retried but the second"
-            + " succeeds, then the records in the second batch may appear first. Note additionall that produce requests will be"
+            + " succeeds, then the records in the second batch may appear first. Note additionally that produce requests will be"
             + " failed before the number of retries has been exhausted if the timeout configured by"
             + " <code>" + DELIVERY_TIMEOUT_MS_CONFIG + "</code> expires first before successful acknowledgement. Users should generally"
             + " prefer to leave this config unset and instead use <code>" + DELIVERY_TIMEOUT_MS_CONFIG + "</code> to control"

core/src/main/scala/kafka/server/KafkaConfig.scala

@@ -566,8 +566,8 @@ object KafkaConfig {
     "then controller will use \"broker1.example.com:9094\" with security protocol \"SSL\" to connect to the broker.\n" +
     "If not explicitly configured, the default value will be null and there will be no dedicated endpoints for controller connections."
 
-  val SocketSendBufferBytesDoc = "The SO_SNDBUF buffer of the socket sever sockets. If the value is -1, the OS default will be used."
-  val SocketReceiveBufferBytesDoc = "The SO_RCVBUF buffer of the socket sever sockets. If the value is -1, the OS default will be used."
+  val SocketSendBufferBytesDoc = "The SO_SNDBUF buffer of the socket server sockets. If the value is -1, the OS default will be used."
+  val SocketReceiveBufferBytesDoc = "The SO_RCVBUF buffer of the socket server sockets. If the value is -1, the OS default will be used."
   val SocketRequestMaxBytesDoc = "The maximum number of bytes in a socket request"
   val MaxConnectionsPerIpDoc = "The maximum number of connections we allow from each ip address. This can be set to 0 if there are overrides " +
     "configured using " + MaxConnectionsPerIpOverridesProp + " property"