use win32 2.6.1.0 (second try)

Using patched http-client.

git-annex.cabal

@@ -380,8 +380,12 @@ Executable git-annex
     Build-Depends: network (< 2.6), network (>= 2.4)
 
   if (os(windows))
-    Build-Depends: Win32 (== 2.3.1.1), Win32-extras, unix-compat (>= 0.4.1.3), setenv,
-      process (>= 1.4.2.0)
+    Build-Depends:
+      Win32 (>= 2.6.1.0),
+      Win32-extras,
+      unix-compat (>= 0.5),
+      setenv,
+      process (>= 1.6.2.0)
   else
     Build-Depends: unix
     if impl(ghc <= 7.6.3)

stack-windows.yaml

@@ -17,14 +17,19 @@ flags:
 packages:
 - '.'
 - location:
-    git: https://github.com/joeyh/win32
-    commit: 9250d2b8cadf5a98ffb3f68d933a6257c1b7e23d
+    git: https://github.com/snoyberg/http-client
+    commit: 9207033c9869a46f7df759b56d1b317a7f542d63
   extra-dep: true
 extra-deps:
 - aws-0.17.1
 - bloomfilter-2.0.1.0
 - torrent-10000.1.1
 - yesod-default-1.2.0
+- Win32-2.6.1.0
+- unix-compat-0.5
+- directory-1.3.1.5
+- process-1.6.2.0
+allow-newer: true
 explicit-setup-deps:
   git-annex: true
 resolver: lts-9.10