MINOR: mux-h1: Don't perform implicit HTTP/2 upgrade if not supported by mux
For now this tests is useless, but if the H1 muliplexer is flagged to
explicitly not support the upgrades to HTTP/2, an error is returned.
diff --git a/src/mux_h1.c b/src/mux_h1.c
index 656c0a1..13110de 100644
--- a/src/mux_h1.c
+++ b/src/mux_h1.c
@@ -2665,7 +2665,8 @@
/* First of all handle H1 to H2 upgrade (no need to create the H1 stream) */
if (!(h1c->flags & H1C_F_WAIT_NEXT_REQ) && /* First request */
- !(h1c->px->options2 & PR_O2_NO_H2_UPGRADE)) { /* H2 upgrade supported by the proxy */
+ !(h1c->px->options2 & PR_O2_NO_H2_UPGRADE) && /* H2 upgrade supported by the proxy */
+ !(conn->mux->flags & MX_FL_NO_UPG)) { /* the current mux supports upgrades */
/* Try to match H2 preface before parsing the request headers. */
if (b_isteq(&h1c->ibuf, 0, b_data(&h1c->ibuf), ist(H2_CONN_PREFACE)) > 0) {
h1c->flags |= H1C_F_UPG_H2C;