REORG/MAJOR: use "struct channel" instead of "struct buffer"
This is a massive rename. We'll then split channel and buffer.
This change needs a lot of cleanups. At many locations, the parameter
or variable is still called "buf" which will become ambiguous. Also,
the "struct channel" is still defined in buffers.h.
diff --git a/src/frontend.c b/src/frontend.c
index 82699dc..8405bf6 100644
--- a/src/frontend.c
+++ b/src/frontend.c
@@ -251,7 +251,7 @@
* are removed from the buffer. The function returns zero if it needs to wait
* for more data (max: timeout_client), or 1 if it has finished and removed itself.
*/
-int frontend_decode_proxy_request(struct session *s, struct buffer *req, int an_bit)
+int frontend_decode_proxy_request(struct session *s, struct channel *req, int an_bit)
{
char *line = req->data;
char *end = req->data + req->i;