system autoupdate push-update

Introduction.

config system autoupdate push-update
    set status {enable | disable}   Enable/disable push updates.
    set override {enable | disable}   Enable/disable push update override server.
    set address {ipv4 address any}   Push update override server.
    set port {integer}   Push update override port. (Do not overlap with other service ports) range[0-65535]
end