sockets adding TCP_QUICKACK constant.

having tigher control on ACK delays, difference is the setting
is `volatile` as it can be turned off by the kernel if not set
 explicitally set otherwise on the socket.

Closes GH-10145.

NEWS

@@ -70,6 +70,8 @@ PHP                                                                        NEWS
     over socket binding for a cpu core. (David Carlier)
   . Added SKF_AD_QUEUE for cbpf filters. (David Carlier)
   . Added socket_atmark if send/recv needs using MSG_OOB. (David Carlier)
+  . Added TCP_QUICKACK constant, to give tigher control over
+    ACK delays. (David Carlier)
 
 - Standard:
   . E_NOTICEs emitted by unserialize() have been promoted to E_WARNING. (timwolla)

UPGRADING

@@ -105,6 +105,7 @@ PHP 8.3 UPGRADE NOTES
 
 - Sockets:
   . SO_ATTACH_REUSEPORT_CBPF (Linux only).
+  . TCP_QUICKACK (Linux only).
 
 ========================================
 11. Changes to INI File Handling

ext/sockets/sockets.stub.php

@@ -1699,6 +1699,13 @@ const SO_DETACH_FILTER = UNKNOWN;
  */
 const SO_DETACH_BPF = UNKNOWN;
 #endif
+#if defined(TCP_QUICKACK)
+/**
+ * @var int
+ * @cvalue TCP_QUICKACK
+ */
+const TCP_QUICKACK = UNKNOWN;
+#endif
 
 /**
  * @strict-properties

ext/sockets/sockets_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 4fb48cdd2188e8834fd2210027adc1072e885d6e */
+ * Stub hash: abec5e538a69c27451c0cac0a19a92fc6df667eb */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_socket_select, 0, 4, MAY_BE_LONG|MAY_BE_FALSE)
 	ZEND_ARG_TYPE_INFO(1, read, IS_ARRAY, 1)
@@ -988,6 +988,9 @@ static void register_sockets_symbols(int module_number)
 #if defined(SO_DETACH_BPF)
 	REGISTER_LONG_CONSTANT("SO_DETACH_BPF", SO_DETACH_BPF, CONST_PERSISTENT);
 #endif
+#if defined(TCP_QUICKACK)
+	REGISTER_LONG_CONSTANT("TCP_QUICKACK", TCP_QUICKACK, CONST_PERSISTENT);
+#endif
 }
 
 static zend_class_entry *register_class_Socket(void)