BUG/MINOR: h1-htx: Fix a typo when request parser is reset

In h1_postparse_req_hdrs(), if we need more space to copy headers, the request
parser is reset. However, because of a typo, it was reset as a response parser
instead of a request one. h1m_init_req() must be called.

This patch must be backported as far as 2.2.

(cherry picked from commit 216d3352b1aac1bff19383b6a6e5476e11e613e9)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/src/h1_htx.c b/src/h1_htx.c
index 55fc42b..258d7f7 100644
--- a/src/h1_htx.c
+++ b/src/h1_htx.c
@@ -165,7 +165,7 @@
 	if (h1_eval_htx_size(meth, uri, vsn, hdrs) > max) {
 		if (htx_is_empty(htx))
 			goto error;
-		h1m_init_res(h1m);
+		h1m_init_req(h1m);
 		h1m->flags |= (H1_MF_NO_PHDR|H1_MF_CLEAN_CONN_HDR);
 		return 0;
 	}