vendor: update all dependencies

vendor/github.com/mattn/go-ieproxy/pac_windows.go

@@ -0,0 +1,72 @@
+package ieproxy
+
+import (
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+func (psc *ProxyScriptConf) findProxyForURL(URL string) string {
+	if !psc.Active {
+		return ""
+	}
+	proxy, _ := getProxyForURL(psc.PreConfiguredURL, URL)
+	i := strings.Index(proxy, ";")
+	if i >= 0 {
+		return proxy[:i]
+	}
+	return proxy
+}
+
+func getProxyForURL(pacfileURL, URL string) (string, error) {
+	pacfileURLPtr, err := syscall.UTF16PtrFromString(pacfileURL)
+	if err != nil {
+		return "", err
+	}
+	URLPtr, err := syscall.UTF16PtrFromString(URL)
+	if err != nil {
+		return "", err
+	}
+
+	handle, _, err := winHttpOpen.Call(0, 0, 0, 0, 0)
+	if handle == 0 {
+		return "", err
+	}
+	defer winHttpCloseHandle.Call(handle)
+
+	dwFlags := fWINHTTP_AUTOPROXY_CONFIG_URL
+	dwAutoDetectFlags := autoDetectFlag(0)
+	pfURLptr := pacfileURLPtr
+
+	if pacfileURL == "" {
+		dwFlags = fWINHTTP_AUTOPROXY_AUTO_DETECT
+		dwAutoDetectFlags = fWINHTTP_AUTO_DETECT_TYPE_DNS_A | fWINHTTP_AUTO_DETECT_TYPE_DHCP
+		pfURLptr = nil
+	}
+
+	options := tWINHTTP_AUTOPROXY_OPTIONS{
+		dwFlags:                dwFlags, // adding cache might cause issues: https://github.com/mattn/go-ieproxy/issues/6
+		dwAutoDetectFlags:      dwAutoDetectFlags,
+		lpszAutoConfigUrl:      pfURLptr,
+		lpvReserved:            nil,
+		dwReserved:             0,
+		fAutoLogonIfChallenged: true, // may not be optimal https://msdn.microsoft.com/en-us/library/windows/desktop/aa383153(v=vs.85).aspx
+	} // lpszProxyBypass isn't used as this only executes in cases where there (may) be a pac file (autodetect can fail), where lpszProxyBypass couldn't be returned.
+	// in the case that autodetect fails and no pre-specified pacfile is present, no proxy is returned.
+
+	info := new(tWINHTTP_PROXY_INFO)
+
+	ret, _, err := winHttpGetProxyForURL.Call(
+		handle,
+		uintptr(unsafe.Pointer(URLPtr)),
+		uintptr(unsafe.Pointer(&options)),
+		uintptr(unsafe.Pointer(info)),
+	)
+	if ret > 0 {
+		err = nil
+	}
+
+	defer globalFreeWrapper(info.lpszProxyBypass)
+	defer globalFreeWrapper(info.lpszProxy)
+	return StringFromUTF16Ptr(info.lpszProxy), err
+}