- client pubkey auth works

- rearrange the runopts code for client and server (hostkey reading is needed
  by both (if the client is doing pubkey auth. otherwise....))

--HG--
extra : convert_revision : 5420858803bfff1e27dfe7fa877ba6fdd747e0c5

session.h

@@ -214,7 +214,6 @@ struct clientsession {
 
 	int winchange; /* Set to 1 when a windowchange signal happens */
 
-	struct PubkeyList *pubkeys; /* Keys to use for public-key auth */
 	int lastauthtype; /* either AUTH_TYPE_PUBKEY or AUTH_TYPE_PASSWORD,
 						 for the last type of auth we tried */
 	struct PubkeyList *lastpubkey;