[BUG] proxy: stats frontend and peers were missing many initializers

This was revealed with one of the very latest patches which caused
the listener_queue not to be initialized on the stats socket frontend.
And in fact a number of other ones were missing too. This is getting so
boring that now we'll always make use of the same function to initialize
any proxy. Doing so has even saved about 500 bytes on the binary due to
the avoided code redundancy.

No backport is needed.
diff --git a/src/cfgparse.c b/src/cfgparse.c
index fd81a20..04373ac 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -1020,34 +1020,6 @@
 	return err_code;
 }
 
-/* Perform the most basic initialization of a proxy :
- * memset(), list_init(*), reset_timeouts(*).
- */
-static void init_new_proxy(struct proxy *p)
-{
-	memset(p, 0, sizeof(struct proxy));
-	LIST_INIT(&p->pendconns);
-	LIST_INIT(&p->acl);
-	LIST_INIT(&p->http_req_rules);
-	LIST_INIT(&p->block_cond);
-	LIST_INIT(&p->redirect_rules);
-	LIST_INIT(&p->mon_fail_cond);
-	LIST_INIT(&p->switching_rules);
-	LIST_INIT(&p->persist_rules);
-	LIST_INIT(&p->sticking_rules);
-	LIST_INIT(&p->storersp_rules);
-	LIST_INIT(&p->tcp_req.inspect_rules);
-	LIST_INIT(&p->tcp_rep.inspect_rules);
-	LIST_INIT(&p->tcp_req.l4_rules);
-	LIST_INIT(&p->req_add);
-	LIST_INIT(&p->rsp_add);
-	LIST_INIT(&p->listener_queue);
-
-	/* Timeouts are defined as -1 */
-	proxy_reset_timeouts(p);
-	p->tcp_rep.inspect_delay = TICK_ETERNITY;
-}
-
 void init_default_instance()
 {
 	init_new_proxy(&defproxy);
@@ -1278,18 +1250,9 @@
 					err_code |= ERR_ALERT | ERR_ABORT;
 					goto out;
 				}
-				curpeers->peers_fe->parent = curpeers;
 
-				LIST_INIT(&(curpeers->peers_fe)->pendconns);
-				LIST_INIT(&(curpeers->peers_fe)->acl);
-				LIST_INIT(&(curpeers->peers_fe)->block_cond);
-				LIST_INIT(&(curpeers->peers_fe)->redirect_rules);
-				LIST_INIT(&(curpeers->peers_fe)->mon_fail_cond);
-				LIST_INIT(&(curpeers->peers_fe)->switching_rules);
-				LIST_INIT(&(curpeers->peers_fe)->tcp_req.inspect_rules);
-				LIST_INIT(&(curpeers->peers_fe)->tcp_rep.inspect_rules);
-
-				proxy_reset_timeouts(curpeers->peers_fe);
+				init_new_proxy(curpeers->peers_fe);
+				curpeers->peers_fe->parent = curpeers;
 
 				curpeers->peers_fe->last_change = now.tv_sec;
 				curpeers->peers_fe->id = strdup(args[1]);