Fix zlib symbol export

This patch makes ppp_deflate load as a module again.
It also needs the obvious mv linux/* include/linux fix for 2.5.3 to let the new zlib library compile.

Patch against 2.5.3. Please apply.

Thanks,
-Andi

@@ -18,4 +18,5 @@
 EXPORT_SYMBOL(zlib_inflateSync);
 EXPORT_SYMBOL(zlib_inflateReset);
 EXPORT_SYMBOL(zlib_inflateSyncPoint);
+EXPORT_SYMBOL(zlib_inflateIncomp); 
 MODULE_LICENSE("GPL");