add common parameters to generic get API

Honestly this was just done to make the documentation correct. There's
no point in using these parameters. And they're optional.

P2P/Http.hs

@@ -64,6 +64,8 @@ p2pHttpAPI = Proxy
 
 type GetGenericAPI
 	= CaptureKey
+	:> CU Optional
+	:> BypassUUIDs
 	:> IsSecure
 	:> AuthHeader
 	:> StreamGet NoFraming OctetStream

P2P/Http/Server.hs

@@ -83,16 +83,18 @@ serveGetGeneric
 	:: P2PHttpServerState
 	-> B64UUID ServerSide
 	-> B64Key
+	-> Maybe (B64UUID ClientSide)
+	-> [B64UUID Bypass]
 	-> IsSecure
 	-> Maybe Auth
 	-> Handler (Headers '[DataLengthHeader] (S.SourceT IO B.ByteString))
-serveGetGeneric st su@(B64UUID u) k =
+serveGetGeneric st su@(B64UUID u) k mcu bypass =
 	-- Use V0 because it does not alter the returned data to indicate
 	-- Invalid content.
-	serveGet st su V0 k cu [] Nothing Nothing
+	serveGet st su V0 k (fromMaybe scu mcu) bypass Nothing Nothing
   where
 	-- Reuse server UUID as client UUID.
-	cu = B64UUID u :: B64UUID ClientSide
+	scu = B64UUID u :: B64UUID ClientSide
 
 serveGet
 	:: APIVersion v

doc/design/p2p_protocol_over_http.mdwn

@@ -97,6 +97,9 @@ http server.
 When the key is not present on the server, it will respond
 with 404 Not Found.
 
+Note that the common parameters bypass and clientuuid, while
+accepted, have no effect. Both are optional for this request.
+
 ### GET /git-annex/$uuid/v3/key/$key
 
 Get the content of a key from the repository with the specified uuid.