Add missing plugin_core.h for core options

src/plugin_core.h

@@ -0,0 +1,15 @@
+#ifndef _LIGHTTPD_PLUGIN_CORE_H_
+#define _LIGHTTPD_PLUGIN_CORE_H_
+
+enum core_options_t {
+	CORE_OPTION_DEBUG_REQUEST_HANDLING = 0,
+	CORE_OPTION_LOG_LEVEL = 1,
+
+	CORE_OPTION_STATIC_FILE_EXCLUDE = 2
+};
+
+/* the core plugin always has base index 0, as it is the first plugin loaded */
+#define CORE_OPTION(idx) _CORE_OPTION(con, idx)
+#define _CORE_OPTION(con, idx) _OPTION_ABS(con, idx)
+
+#endif