Replace boolean type with bool in examples

This is part of a move to encourage use of the standard bool type over Arduino's non-standard boolean type alias.

Author: per1234

examples/BarometricPressureWebServer/BarometricPressureWebServer.ino

@@ -156,7 +156,7 @@ void listenForEthernetClients() {
   if (client) {
     Serial.println("Got a client");
     // an http request ends with a blank line
-    boolean currentLineIsBlank = true;
+    bool currentLineIsBlank = true;
     while (client.connected()) {
       if (client.available()) {
         char c = client.read();

examples/ChatServer/ChatServer.ino

@@ -32,7 +32,7 @@ IPAddress subnet(255, 255, 0, 0);
 
 // telnet defaults to port 23
 EthernetServer server(23);
-boolean alreadyConnected = false; // whether or not the client was connected previously
+bool alreadyConnected = false; // whether or not the client was connected previously
 
 void setup() {
   // You can use Ethernet.init(pin) to configure the CS pin

examples/DhcpChatServer/DhcpChatServer.ino

@@ -36,7 +36,7 @@ IPAddress subnet(255, 255, 0, 0);
 
 // telnet defaults to port 23
 EthernetServer server(23);
-boolean gotAMessage = false; // whether or not you got a message from the client yet
+bool gotAMessage = false; // whether or not you got a message from the client yet
 
 void setup() {
   // You can use Ethernet.init(pin) to configure the CS pin

examples/WebServer/WebServer.ino

@@ -75,7 +75,7 @@ void loop() {
   if (client) {
     Serial.println("new client");
     // an http request ends with a blank line
-    boolean currentLineIsBlank = true;
+    bool currentLineIsBlank = true;
     while (client.connected()) {
       if (client.available()) {
         char c = client.read();