update help for DHT

macosx/TransmissionHelp/html/FAQ.html

@@ -30,7 +30,7 @@
 			<div id="pagetitle">
 				<h1>Why isn't my torrent downloading at all? </h1>
 			</div>
-				<p>Normally this is because the tracker is down, and thus Transmission is unable to interact with other peers. DHT (trackerless torrents) is not a feature at the moment, however is slated for a future release. 
+				<p>Often this is because the tracker is down, and thus Transmission is unable to interact with other peers. If this is the case, enabling DHT (trackerless torrents) (Prefs >> Peers) might help for public torrents. 
 				<p>If there are no seeders in the swarm, and all the other peers have sent you what they have, you (and everyone else) will not be able to complete the download, and your speed will drop to zero.
 				<p>Torrents take a while to get going and so may not download much (if at all) initially. Most torrents are downloading at some rate after 15 or so minutes. 
 				<p>

macosx/TransmissionHelp/html/peers.html

@@ -25,6 +25,12 @@
 				<p>Peer Exchange (PEX) is a method of discovering new peers via other peers, rather than the tracker. It allows Transmission to attach to the swarm much quicker. 
 				PEX is automatically disabled for privately tracked torrents. The feature is compatible with both Azureus and µTorrent peers.
 				<p>
+			<div id="pagetitle">
+				<h1>What is the 'distributed hash table'? </h1>
+			</div>
+				<p>The Distributed Hash Table (DHT) allows peers to be obtained without connecting to the tracker. This allows transfers to continue even if trackers are unreachable.
+				 It is another way that Transmission can attach to the swarm quicker. DHT is automatically disabled for privately tracked torrents.
+				<p>
 			<div id="pagetitle">
 				<h1>What is encryption? </h1>
 			</div>