11554 Want TCP_CONGESTION socket option
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>

@@ -127,10 +127,11 @@
 #define TCP_ANONPRIVBIND                0x20    /* for internal use only  */
 #define TCP_EXCLBIND                    0x21    /* for internal use only  */
 #define TCP_KEEPIDLE                    0x22
 #define TCP_KEEPCNT                     0x23
 #define TCP_KEEPINTVL                   0x24
+#define TCP_CONGESTION                  0x25
 
 #ifdef  __cplusplus
 }
 #endif