Add PHP_SBINDIR (#13363)

The PHP_SBINDIR symbol was defined on *nix systems but never used. This
adds the constant similar to PHP_BINDIR also to PHP. On Windows it is
the value of prefix configuration when PHP was built (same value as
PHP_BINDIR).

Author: petk

UPGRADING

@@ -638,6 +638,7 @@ PHP 8.4 UPGRADE NOTES
 
 - Core:
   . PHP_OUTPUT_HANDLER_PROCESSED.
+  . PHP_SBINDIR.
 
 - Intl:
   . The IntlDateFormatter class exposes now the new PATTERN constant

main/main.stub.php

@@ -84,6 +84,11 @@
  * @cvalue PHP_BINDIR
  */
 const PHP_BINDIR = UNKNOWN;
+/**
+ * @var string
+ * @cvalue PHP_SBINDIR
+ */
+const PHP_SBINDIR = UNKNOWN;
 #ifndef PHP_WIN32
 /**
  * @var string

main/main_arginfo.h

@@ -12,6 +12,7 @@
 #define PHP_CONFIG_FILE_PATH ""
 #define PEAR_INSTALLDIR "@PREFIX@\\pear"
 #define PHP_BINDIR "@PREFIX@"
+#define PHP_SBINDIR "@PREFIX@"
 #define PHP_DATADIR "@PREFIX@"
 #define PHP_EXTENSION_DIR "@PREFIX@\\ext"
 #define PHP_INCLUDE_PATH	".;@PREFIX@\\pear"