Revert "remove the example-based folder. The code is still in the archive"

This reverts commit 05c2cfb628.

src/example-based/exb-fcgi.hs

@@ -0,0 +1,15 @@
+{-# LANGUAGE CPP #-}
+import Control.Concurrent(forkIO)
+import Network.FastCGI(runFastCGI,runFastCGIConcurrent')
+import ExampleService(cgiMain,newPGFCache)
+
+main = do --stderrToFile logFile
+          fcgiMain =<< newPGFCache
+
+
+fcgiMain cache =
+#ifndef mingw32_HOST_OS
+          runFastCGIConcurrent' forkIO 100 (cgiMain cache)
+#else
+          runFastCGI (cgiMain cache)
+#endif