Add TCP_CONGESTION and TCP_USER_TIMEOUT

Issue #26273: Add new socket.TCP_CONGESTION (Linux 2.6.13) and
socket.TCP_USER_TIMEOUT (Linux 2.6.37) constants.

Patch written by Omar Sandoval.

Misc/NEWS

@@ -160,6 +160,10 @@ Core and Builtins
 Library
 -------
 
+- Issue #26273: Add new :data:`socket.TCP_CONGESTION` (Linux 2.6.13) and
+  :data:`socket.TCP_USER_TIMEOUT` (Linux 2.6.37) constants. Patch written by
+  Omar Sandoval.
+
 - Issue #28752: Restored the __reduce__() methods of datetime objects.
 
 - Issue #28727: Regular expression patterns, _sre.SRE_Pattern objects created

Modules/socketmodule.c

@@ -7540,6 +7540,12 @@ PyInit__socket(void)
 #ifdef  TCP_FASTOPEN
     PyModule_AddIntMacro(m, TCP_FASTOPEN);
 #endif
+#ifdef  TCP_CONGESTION
+    PyModule_AddIntMacro(m, TCP_CONGESTION);
+#endif
+#ifdef  TCP_USER_TIMEOUT
+    PyModule_AddIntMacro(m, TCP_USER_TIMEOUT);
+#endif
 
     /* IPX options */
 #ifdef  IPX_TYPE