1 files changed, 13 insertions, 1 deletions
diff --git a/lib/url.c b/lib/url.c
index 47fc66ae..03c27443 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -114,6 +114,7 @@ bool curl_win32_idn_to_ascii(const char *in, char **out);
 #include "http_ntlm.h"
 #include "curl_rtmp.h"
 #include "gopher.h"
+#include "mqtt.h"
 #include "http_proxy.h"
 #include "conncache.h"
 #include "multihandle.h"
@@ -232,6 +233,10 @@ static const struct Curl_handler * const protocols[] = {
   &Curl_handler_gopher,
 #endif
 
+#ifdef CURL_ENABLE_MQTT
+  &Curl_handler_mqtt,
+#endif
+
 #ifdef USE_LIBRTMP
   &Curl_handler_rtmp,
   &Curl_handler_rtmpt,
@@ -3040,7 +3045,14 @@ static CURLcode parse_connect_to_slist(struct Curl_easy *data,
 
 #ifdef USE_ALTSVC
   if(data->asi && !host && (port == -1) &&
-     (conn->handler->protocol == CURLPROTO_HTTPS)) {
+     ((conn->handler->protocol == CURLPROTO_HTTPS) ||
+#ifdef CURLDEBUG
+      /* allow debug builds to circumvent the HTTPS restriction */
+      getenv("CURL_ALTSVC_HTTP")
+#else
+      0
+#endif
+       )) {
     /* no connect_to match, try alt-svc! */
     enum alpnid srcalpnid;
     bool hit;