initial patches for linux compatibility

plugins/perl/perl.c

@@ -27,7 +27,7 @@
 #endif
 #ifdef WIN32
 #include <windows.h>
-#define  _INC_DIRENT
+#define  _INC_DIRENT /* disable inclusion of perl's dirent.h, we use an own version for win32 */
 #include "../../src/common/dirent.h"
 #else
 #include <dirent.h>

plugins/perl/perl.def

@@ -0,0 +1,4 @@
+EXPORTS
+  xchat_plugin_init
+  xchat_plugin_deinit
+  xchat_plugin_get_info