Get missing defaults and save options when loading
Get missing defaults and save options when loading

Follow-up to ref 60632d42f.  Initial implementation would lose loaded
options when the module was reloaded, and would cause errors if the
loaded dictionary did not contain all of the option values.

tonyolag/znc-push,larsks/znc-push,dgw/znc-push,omnidan/znc-push,kedare/znc-push,jreese/znc-push