Update README.md

Author: limithit

README.md

@@ -109,7 +109,17 @@ Starting from NGINX 1.9.11, you can also compile this module as a dynamic module
 ```nginx
     load_module /path/to/modules/ngx_dynamic_limit_req_module.so;
 ```
-
+## Issue?
+1)redis connection error: Cannot assign requested address 
+```
+echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse
+echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle
+```
+2)nginx too many established
+```
+nginx.conf
+keepalive_timeout  6;
+```
 This module is compatible with following nginx releases:
 
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