feat: support base64 decode before resolve clash subscription. mzz201…

…7#22

optimize(test url): determine the correct status code based on the path

optimize: advance sudo if use gg sudo

feat: auto su

chore: fix build with go1.19 (#19)

fix: try to fix arm64 error. #15

fix: may fix a problem that incorrectly forward udp packet to unsuppo…

…rted server #15

fix: 6in4 mapping problem

fix: http(s) proxy should allow empty port

chore(actions): runs on ubuntu-22.04 to use higher version upx