OpenWRT 修改feeds.conf.default为GitHub源
lede和openwrt合并之后 lede官网挂了。。 git.openwrt.org，也访问不了。。
只好去github上找最新源码：
git clone https://github.com/openwrt/openwrt.git
最新的lede
git clone -b lede-17.01 https://github.com/openwrt/openwrt.git
但是问题又来了，，
./script/feeds update -a 又挂了，，
查看文件feeds.conf.default ：
src-git packages https://git.openwrt.org/feed/packages.git
src-git luci https://git.openwrt.org/project/luci.git
src-git routing https://git.openwrt.org/feed/routing.git
src-git telephony https://git.openwrt.org/feed/telephony.git
#src-git video https://github.com/openwrt/video.git
#src-git targets https://github.com/openwrt/targets.git
#src-git management https://github.com/openwrt-management/packages.git
#src-git oldpackages http://git.openwrt.org/packages.git
#src-link custom /usr/src/openwrt/custom-feed
git.openwrt.org访问不了，无法更新，只能使用github源地址： 更新如下：
src-git packages https://github.com/openwrt/packages.git
src-git luci https://github.com/openwrt/luci.git
src-git routing https://github.com/openwrt-routing/packages.git
src-git telephony https://github.com/openwrt/telephony.git
src-git management https://github.com/openwrt-management/packages.git
OK，./script/feeds update -a 可以了
