Add TCP socket options from glibc 2.2.4. Fixes #495680.
2.2.1 bugfix candidate.
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index bbca138..124353e 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -3621,6 +3621,37 @@
#ifdef TCP_MAXSEG
insint(d, "TCP_MAXSEG", TCP_MAXSEG);
#endif
+#ifdef TCP_CORK
+ insint(d, "TCP_CORK", TCP_CORK);
+#endif
+#ifdef TCP_KEEPIDLE
+ insint(d, "TCP_KEEPIDLE", TCP_KEEPIDLE);
+#endif
+#ifdef TCP_KEEPINTVL
+ insint(d, "TCP_KEEPINTVL", TCP_KEEPINTVL);
+#endif
+#ifdef TCP_KEEPCNT
+ insint(d, "TCP_KEEPCNT", TCP_KEEPCNT);
+#endif
+#ifdef TCP_SYNCNT
+ insint(d, "TCP_SYNCNT", TCP_SYNCNT);
+#endif
+#ifdef TCP_LINGER2
+ insint(d, "TCP_LINGER2", TCP_LINGER2);
+#endif
+#ifdef TCP_DEFER_ACCEPT
+ insint(d, "TCP_DEFER_ACCEPT", TCP_DEFER_ACCEPT);
+#endif
+#ifdef TCP_WINDOW_CLAMP
+ insint(d, "TCP_WINDOW_CLAMP", TCP_WINDOW_CLAMP);
+#endif
+#ifdef TCP_INFO
+ insint(d, "TCP_INFO", TCP_INFO);
+#endif
+#ifdef TCP_QUICKACK
+ insint(d, "TCP_QUICKACK", TCP_QUICKACK);
+#endif
+
/* IPX options */
#ifdef IPX_TYPE