Typos.

Fixes https://github.com/kristapsdz/kcgi/pull/64
Fixes https://github.com/kristapsdz/kcgi/pull/65

tutorial1.xml

@@ -10,7 +10,7 @@
 		<aside itemprop="about">
 			Cookies are an integral part of any web application.
 			In this tutorial, I'll describe how to use the HTTP header functionality in <span class="nm">kcgi</span> to set,
-			recognise, and store headers.
+			recognise, and store cookies.
 		</aside>
 	</p>
 	<h3>

tutorial4.xml

@@ -108,7 +108,7 @@
 	</figure>
 	<p>
 		We then define a constant bitmap corresponding with those <code>enum pg</code> values for which no extra path information should
-		be prsent in the <abbr>HTTP</abbr> request.
+		be present in the <abbr>HTTP</abbr> request.
 		This will be used for sanity-checking the request.
 	</p>
 	<figure class="sample">