Update HushList protocol whitepaper some more

whitepaper/protocol.tex

@@ -1017,10 +1017,23 @@ is equivalent to
 
 Additionally, URL parameters can be used to speficify a nickname and fee for the list to be imported:
 
-	hushlist://HUSH:mainnet@K?n=nickname\&fee=X
+	hushlist://HUSH:mainnet@K?n=nickname\&fee=X\&height=N
 
 The nickname and fee are just suggestions and the user \MUST be able to modify them before importing the list.
+The height is actually for performance reasons, and helps the local avoid scanning the entire history of the
+blockchain for transactions. 
 
+The first public HushList can be uniquely identified by the following URL
+
+	hushlist://SKxqPjNKvcfpmBpR8daQHNj4DoMfKmaPiVcT3A3YPynZNYXoDoaq
+
+For performance reasons, we can help each node skip over 200,000 transactions
+by specfying the minimum block height for z\_importkey to look in. This more
+performant URL is:
+
+	hushlist://SKxqPjNKvcfpmBpR8daQHNj4DoMfKmaPiVcT3A3YPynZNYXoDoaq?height=215683
+
+This HushList contains the first HushList memo, described in the sections below.
 
 \nsection{Sending To A List}