BUG/MEDIUM: stream: The stream doen't inherit SC from the session

During the processing of tcp-request connection, the stream doesn't exists, so the
stick counters are stored in the session. When the stream is created it must
inherit from the session sc.

This patch fix this behavior.

[WT: this is specific to 1.6, no backport needed]
diff --git a/src/stream.c b/src/stream.c
index e6f1fc6..910b309 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -107,7 +107,7 @@
 	s->current_rule_list = NULL;
 	s->current_rule = NULL;
 
-	memset(s->stkctr, 0, sizeof(s->stkctr));
+	memcpy(s->stkctr, sess->stkctr, sizeof(s->stkctr));
 
 	s->sess = sess;
 	s->si[0].flags = SI_FL_NONE;