Improve cache and toolchain download (#2665)

* Improve cache and toolchain download

* Cleanup

lib/configuration.sh

@@ -497,7 +497,13 @@ if [[ $DOWNLOAD_MIRROR == china ]] ; then
 	UBUNTU_MIRROR='mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/'
 fi
 
-ARMBIAN_MIRROR='https://redirect.armbian.com'
+# don't use mirrors that throws garbage on 404
+while true; do
+
+	ARMBIAN_MIRROR=$(wget -SO- -T 1 -t 1 https://redirect.armbian.com 2>&1 | egrep -i "Location" | awk '{print $2}')
+	[[ ${ARMBIAN_MIRROR} != *armbian.hosthatch* ]] && break
+
+done
 
 # For user override
 if [[ -f $USERPATCHES_PATH/lib.config ]]; then