Update REST API help reference page

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/resources/messages.properties

@@ -70,6 +70,7 @@ page.text.apiref.book.add          = Adding a book
 page.text.apiref.book.add.a        = Without author and category information\:
 page.text.apiref.book.add.b        = With author and category information\:
 page.text.apiref.book.add.c        = Without author and with category information\:
+page.text.apiref.book.add.d        = With author's last name\:
 
 page.text.apiref.book.info.a       = Category is correctly mapped even if letter case is not correct.
 

bookstore/src/main/resources/templates/apiref.html

@@ -256,6 +256,22 @@
 				</td>
 			</tr>
 
+			<tr>
+				<td class="apiref-table-right">
+					<small th:text="${#messages.msgOrNull('page.text.apiref.book.add.d')} ?: 'page.text.apiref.book.add.d'">
+					page.text.apiref.book.add.d
+					</small>
+					<br>
+					<code th:text="'curl --include --request POST --header &quot;Content-Type: application/json&quot; --data \'{&quot;title&quot;:&quot;Halo: The Flood&quot;,&quot;year&quot;:2003,&quot;isbn&quot;:&quot;0345459-210&quot;,&quot;price&quot;:24.99,&quot;category&quot;:{&quot;name&quot;:&quot;sCi-fI&quot;},&quot;author&quot;:{&quot;lastname&quot;:&quot;Dietz&quot;}}\' ' + ${baseUrl} + 'api/booklist'">
+					code placeholder
+					</code>
+					<br>
+					<small th:text="${#messages.msgOrNull('page.text.apiref.book.info.a')} ?: 'page.text.apiref.book.info.a'">
+					page.text.apiref.book.info.a
+					</small>
+				</td>
+			</tr>
+
 			<tr>
 				<td>
 					<small th:text="${#messages.msgOrNull('page.text.apiref.unix.info')} ?: 'page.text.apiref.unix.info'">page.text.apiref.unix.info</small>