packages: wifidog: update to 20130917 version

packages: wifidog: update to 20130917 version

This update:
-adds a ProxyPort option (to use a local transparent proxy)
-changes http return code to 302 (was 307, but wifidog speaks
 http 1.0, and we really need 303, it was causing some trouble
 with, for exemple, opera)
-switch to github repo
-correct a small typo
-add drop, log, ulog target for FirewallRule

This is only compile tested, but 3 people are asking for it
https://github.com/wifidog/wifidog-gateway/issues/8

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@free.fr>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@38472 3c298f89-4303-0410-b956-a3cf2f4a3e73