fix logged long locked cache entry name and add count

src/http/ngx_http_file_cache.c

diff --git a/src/http/ngx_http_file_cache.c b/src/http/ngx_http_file_cache.c
index 1e80a39..0cb81d9 100644
--- a/src/http/ngx_http_file_cache.c
+++ b/src/http/ngx_http_file_cache.c
@@ -817,8 +817,8 @@
                 ngx_rbtree_delete(cache->rbtree, &fcn->node);
 
                 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
-                              "ignore long locked inactive cache entry %*s",
-                              NGX_HTTP_CACHE_KEY_LEN, key);
+                       "ignore long locked inactive cache entry %*s, count:%d",
+                       2 * NGX_HTTP_CACHE_KEY_LEN, key, fcn->count);
             }
 
             if (tries++ < 10) {