MINOR: proto_tcp: tcp-request content: enable set-dst and set-dst-var

The set-dst and set dst-var are available at both 'tcp-request
connection' and 'http-request' but not at the layer in the middle.
This patch fixes this miss and enables both set-dst and set-dst-var at
'tcp-request content' layer.
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index 6a5fdef..d4cad22 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -1986,29 +1986,31 @@
 INITCALL1(STG_REGISTER, srv_register_keywords, &srv_kws);
 
 static struct action_kw_list tcp_req_conn_actions = {ILH, {
-	{ "silent-drop",  tcp_parse_silent_drop },
 	{ "set-src",      tcp_parse_set_src_dst },
 	{ "set-src-port", tcp_parse_set_src_dst },
 	{ "set-dst"     , tcp_parse_set_src_dst },
 	{ "set-dst-port", tcp_parse_set_src_dst },
+	{ "silent-drop",  tcp_parse_silent_drop },
 	{ /* END */ }
 }};
 
 INITCALL1(STG_REGISTER, tcp_req_conn_keywords_register, &tcp_req_conn_actions);
 
 static struct action_kw_list tcp_req_sess_actions = {ILH, {
-	{ "silent-drop",  tcp_parse_silent_drop },
 	{ "set-src",      tcp_parse_set_src_dst },
 	{ "set-src-port", tcp_parse_set_src_dst },
 	{ "set-dst"     , tcp_parse_set_src_dst },
 	{ "set-dst-port", tcp_parse_set_src_dst },
+	{ "silent-drop",  tcp_parse_silent_drop },
 	{ /* END */ }
 }};
 
 INITCALL1(STG_REGISTER, tcp_req_sess_keywords_register, &tcp_req_sess_actions);
 
 static struct action_kw_list tcp_req_cont_actions = {ILH, {
-	{ "silent-drop", tcp_parse_silent_drop },
+	{ "set-dst"     , tcp_parse_set_src_dst },
+	{ "set-dst-port", tcp_parse_set_src_dst },
+	{ "silent-drop",  tcp_parse_silent_drop },
 	{ /* END */ }
 }};