detect: http.headers now works for trailers

as it registers the app engine up to the trailers progress

Ticket: 8256

src/detect-http-header.c

@@ -386,14 +386,16 @@ void DetectHttpHeaderRegister(void)
     sigmatch_table[DETECT_HTTP_HEADER].flags |= SIGMATCH_NOOPT;
     sigmatch_table[DETECT_HTTP_HEADER].flags |= SIGMATCH_INFO_STICKY_BUFFER;
 
-    DetectAppLayerInspectEngineRegister("http_header", ALPROTO_HTTP1, SIG_FLAG_TOSERVER,
-            HTP_REQUEST_PROGRESS_HEADERS, DetectEngineInspectBufferGeneric, GetData1);
+    DetectAppLayerInspectEngineRegister2("http_header", ALPROTO_HTTP1, SIG_FLAG_TOSERVER,
+            HTP_REQUEST_PROGRESS_HEADERS, HTP_REQUEST_PROGRESS_TRAILER,
+            DetectEngineInspectBufferGeneric, GetData1);
     DetectAppLayerMpmRegister("http_header", SIG_FLAG_TOSERVER, 2,
             PrefilterMpmHttpHeaderRequestRegister, NULL, ALPROTO_HTTP1,
             0); /* not used, registered twice: HEADERS/TRAILER */
 
-    DetectAppLayerInspectEngineRegister("http_header", ALPROTO_HTTP1, SIG_FLAG_TOCLIENT,
-            HTP_RESPONSE_PROGRESS_HEADERS, DetectEngineInspectBufferGeneric, GetData1);
+    DetectAppLayerInspectEngineRegister2("http_header", ALPROTO_HTTP1, SIG_FLAG_TOCLIENT,
+            HTP_RESPONSE_PROGRESS_HEADERS, HTP_RESPONSE_PROGRESS_TRAILER,
+            DetectEngineInspectBufferGeneric, GetData1);
     DetectAppLayerMpmRegister("http_header", SIG_FLAG_TOCLIENT, 2,
             PrefilterMpmHttpHeaderResponseRegister, NULL, ALPROTO_HTTP1,
             0); /* not used, registered twice: HEADERS/TRAILER */