Move struct generic_plugin to sudo_plugin_int.h

src/sudo_plugin_int.h

@@ -17,6 +17,15 @@
 #ifndef _SUDO_PLUGIN_INT_H
 #define _SUDO_PLUGIN_INT_H
 
+/*
+ * All plugin structures start with a type and a version.
+ */
+struct generic_plugin {
+    unsigned int type;
+    unsigned int version;
+    /* the rest depends on the type... */
+};
+
 /*
  * Backwards-compatible structures for API bumps.
  */