MINOR: proto_htx: Add functions htx_send_name_header

It is more or less the same than legacy version but adapted to be called from
HTX analyzers. In the legacy version of this function, we switch on the HTX code
when applicable.
diff --git a/include/proto/proto_http.h b/include/proto/proto_http.h
index 2961eae..40e82b2 100644
--- a/include/proto/proto_http.h
+++ b/include/proto/proto_http.h
@@ -61,7 +61,6 @@
 int htx_process_request(struct stream *s, struct channel *req, int an_bit);
 int htx_process_tarpit(struct stream *s, struct channel *req, int an_bit);
 int htx_wait_for_request_body(struct stream *s, struct channel *req, int an_bit);
-int htx_send_name_header(struct http_txn *txn, struct proxy* be, const char* svr_name);
 int htx_wait_for_response(struct stream *s, struct channel *rep, int an_bit);
 int htx_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px);
 int htx_request_forward_body(struct stream *s, struct channel *req, int an_bit);
@@ -75,6 +74,7 @@
 void htx_res_set_status(unsigned int status, const char *reason, struct stream *s);
 void htx_check_request_for_cacheability(struct stream *s, struct channel *req);
 void htx_check_response_for_cacheability(struct stream *s, struct channel *res);
+int htx_send_name_header(struct stream *s, struct proxy *be, const char *srv_name);
 void htx_server_error(struct stream *s, struct stream_interface *si, int err, int finst, const struct buffer *msg);
 void htx_reply_and_close(struct stream *s, short status, struct buffer *msg);