Documentation/technical/pack-protocol: mention http as possible protocol

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/technical/pack-protocol.txt

@@ -1,11 +1,11 @@
 Packfile transfer protocols
 ===========================
 
-Git supports transferring data in packfiles over the ssh://, git:// and
+Git supports transferring data in packfiles over the ssh://, git://, http:// and
 file:// transports.  There exist two sets of protocols, one for pushing
 data from a client to a server and another for fetching data from a
-server to a client.  All three transports (ssh, git, file) use the same
-protocol to transfer data.
+server to a client.  The three transports (ssh, git, file) use the same
+protocol to transfer data. http is documented in http-protocol.txt.
 
 The processes invoked in the canonical Git implementation are 'upload-pack'
 on the server side and 'fetch-pack' on the client side for fetching data;