Add new mirrors in Seoul and Sydney

host_vars/seoul.mirror.pkgbuild.com/misc

+hostname: "seoul.mirror.pkgbuild.com"
+mirror_domain: "seoul.mirror.pkgbuild.com"
+ipv4_address: "145.40.87.75"
+ipv4_netmask: "/31"
+ipv6_address: "2604:1380:11:2600::1"
+ipv6_netmask: "/127"
+ipv4_gateway: "145.40.87.74"
+ipv6_gateway: "2604:1380:11:2600::"
+filesystem: "btrfs"
+network_interface: "enp2s0f0np0"
+system_disks:
+  - /dev/sda
+  - /dev/sdb
+configure_network: true