MINOR: ssl/server: add the "no-ssl-reuse" server option

This option disables SSL session reuse when SSL is used to communicate with
the server. It will force the server to perform a full handshake for every
new connection. It's probably only useful for benchmarking, troubleshooting,
and for paranoid users.
diff --git a/include/types/server.h b/include/types/server.h
index 4f97e17..23bb2b7 100644
--- a/include/types/server.h
+++ b/include/types/server.h
@@ -122,6 +122,7 @@
 #define SRV_SSL_O_USE_TLSV12   0x0080 /* force TLSv1.2 */
 /* 0x00F0 reserved for 'force' protocol version options */
 #define SRV_SSL_O_NO_TLS_TICKETS 0x0100 /* disable session resumption tickets */
+#define SRV_SSL_O_NO_REUSE     0x200  /* disable session reuse */
 #endif
 
 struct pid_list {