Currently this 3 variable are used only 1 time in the sh script and cause 10s of delay for them to load... move them to load only if it's required by the command. This also fix luci-app-ddns delay problem derived by calling dns_lucihelper (that use tdns_functions to load data) for the version.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>