+#define SSH_BUG_DUMMYCHAN 0x00100000
+#define SSH_BUG_EXTEOF 0x00200000
+#define SSH_BUG_PROBE 0x00400000
+#define SSH_BUG_FIRSTKEX 0x00800000
+#define SSH_OLD_FORWARD_ADDR 0x01000000
+#define SSH_BUG_RFWD_ADDR 0x02000000
+#define SSH_NEW_OPENSSH 0x04000000