Update README.md

Author: bluenet13

README.md

@@ -51,7 +51,8 @@ Support feature:
  - Adding, deleting, showing flow filter rule; 
  - UDP protocol;
  - Socket layer;
- - Socket API compatible with BSD, socket/bind/connect/listen/close/send/recv/epoll/writev/readv/shutdown...;
+ - Socket API compatible with BSD, APP can choice ANS socket or linux socket based on a switch.
+ - socket/bind/connect/listen/close/send/recv/epoll/writev/readv/shutdown...;
  - Support openssl;
  - TCP protocol; 
  - Support reliable transmission;