Revert "fix the vpn mode"

This reverts commit 3429776c313b02bf6634a1fb49b9e4d8b4dd4a2d.
Revert "fix a bypass issue"

This reverts commit 4bf784fd9f0c51f1d9cfd207ceb2b7d79debb88a.
Revert "bypass system dns addr"

This reverts commit 1c4c54e96287e81157db1a034609f35bb53539fc.
Revert "fix the build"

This reverts commit 056bd56d90bcdfa883eec926fe1fe433b1403dd9.
Revert "bypass dns queries for popular sites in china"

This reverts commit 1beb1759573f6353453febd1813e063bfea32aef.