Fix some awkward wording and style problems.

PR:		213061
Reviewed by:	allanjude
Approved by:	allanjude

en_US.ISO8859-1/htdocs/where.xml

@@ -21,6 +21,9 @@
 
     <h2>Choosing an Architecture</h2>
 
+    <p>Most users of &os; will have hardware for either the amd64,
+      i386, or armv6 architectures.</p>
+
     <p>Modern PCs use the amd64 architecture, including those with
       Intel&reg; branded processors.  Computers with more than
       3&nbsp;GB of memory should use amd64.  If the computer is an
@@ -29,6 +32,10 @@
       Bone Black, Panda Board, and Zed Board, use the armv6 SD card
       image which supports ARMv6 and ARMv7 processors.</p>
 
+    <p>All other users should reference the
+      <a href="&base;/platforms/index.html">complete list</a>
+      of supported &os; platforms.</p>
+
     <a name="choose-image"></a>
 
     <h2>Choosing an Image</h2>
@@ -38,7 +45,7 @@
       (bootonly) sized ISO
       Disc Images, as well as regular and mini USB memory stick
       images.  Later versions of &os; are also offered as prebuilt
-      expandable Virtual Machine images, and as SD Cards for embedded
+      expandable Virtual Machine images, and as SD Card images for embedded
       platforms.</p>
 
     <a name="help-statistics"></a>
@@ -329,7 +336,7 @@
     <p>If you plan on getting &os; via HTTP or FTP, please check
       the listing of <a
 	href="&base;/doc/en_US.ISO8859-1/books/handbook/mirrors-ftp.html"><strong>mirror
-	  sites</strong></a> in the handbook to see if there is a site
+	  sites</strong></a> in the Handbook to see if there is a site
       closer to you.</p>
 
     <a name="install"></a>