[appeveyor] rewrite mirrorlist (testing)
[appeveyor] rewrite mirrorlist (testing)

https://github.com/msys2/MINGW-packages/issues/7084#issuecomment-703211308
brain5lug/i2pd,PurpleI2P/i2pd,PurpleI2P/i2pd,brain5lug/i2pd,brain5lug/i2pd,PurpleI2P/i2pd,brain5lug/i2pd,PurpleI2P/i2pd