Adding rules for pgf-http to main gf.cabal file

pgf-http is now part of the standard GF build & install.

gf.cabal

@@ -1,6 +1,6 @@
 name: gf
 version: 3.1.6
-cabal-version: >= 1.2
+cabal-version: >= 1.8
 build-type: Custom
 license: GPL
 license-file: LICENSE
@@ -19,7 +19,9 @@ library
                  array,
                  containers,
                  bytestring,
-                 random
+                 random,
+                 pretty,
+                 mtl
   ghc-options: -O2
   hs-source-dirs: src/compiler src/runtime/haskell
   extensions: 
@@ -157,3 +159,31 @@ executable gf
     other-modules: GF.System.UseSignal
   else
     other-modules: GF.System.NoSignal
+
+
+executable pgf-http
+  hs-source-dirs: src/server
+  main-is: pgf-http.hs
+  other-modules: PGFService FastCGIUtils Cache URLEncoding
+                 RunHTTP ServeStaticFile
+  ghc-options: -threaded
+
+  build-depends: base >=4.2 && <5,
+                 old-time,
+                 directory,
+                 filepath,
+                 containers,
+                 process,
+                 gf,
+                 cgi >= 3001.1.8.0,
+                 httpd-shed,
+                 network,
+                 json >= 0.3.3,
+                 utf8-string >= 0.3.1.1,
+                 bytestring,
+                 pretty,
+                 random
+  if os(windows)
+    ghc-options: -optl-mwindows
+  else
+    build-depends: unix