install openclash on R4S router

• download newest release from github openclash repo:

https://github.com/vernesong/OpenClash

• follow wiki to check all dependency installed

• try install the ipk package via opkg install /abs/path/to/ipk

• if error caused by some package like libcap-bin, find somewhere to download the pacakge

• the arch is aarch64_generic

for example

https://openwrt.proxy.ustclug.org/snapshots/packages/aarch64_generic/base/

download libcap and libcap-bin

• after downloaded requirements and installed them by opkg install, try install openclash again.

• after installed, refresh the admin page of the router.

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