Should it backup user's previous nameserver? #557
+18
−5
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I found my previous DNS setting disappearing due to v2rayA.
So as title discribed, I revise several lines of src, aims at copying the previous DNS to DNS.old, and when Hijack is removing, just copy DNS.old to DNS.
BTW, I'm not sure my code works fine, since I'm not familiar with Golang, I revise them with the help of pkg.go.dev