Upstream: get rid of questionable micro-optimization in ip_hash.

If a peer was initially skipped due to max_fails, there's no reason
not to try it again if enough time has passed, and the next_upstream
logic is in action.

This also reduces diffs with NGINX Plus.

src/http/modules/ngx_http_upstream_ip_hash_module.c

diff --git a/src/http/modules/ngx_http_upstream_ip_hash_module.c b/src/http/modules/ngx_http_upstream_ip_hash_module.c
index debc0d8..d1d71e4 100644
--- a/src/http/modules/ngx_http_upstream_ip_hash_module.c
+++ b/src/http/modules/ngx_http_upstream_ip_hash_module.c
@@ -216,23 +216,18 @@
                        "get ip hash peer, hash: %ui %04XA", p, m);
 
         if (peer->down) {
-            goto next_try;
+            goto next;
         }
 
         if (peer->max_fails
             && peer->fails >= peer->max_fails
             && now - peer->checked <= peer->fail_timeout)
         {
-            goto next_try;
+            goto next;
         }
 
         break;
 
-    next_try:
-
-        iphp->rrp.tried[n] |= m;
-        pc->tries--;
-
     next:
 
         if (++iphp->tries > 20) {