arm failing to parse certain torrc options

voidzero reported on irc that when he starts arm it reports: [ARM-WARN] Unable to validate torrc

This indicates that requesting a couple of the options is causing torctl to return an error response (in this case SocksBindAddress and AllowUnverifiedNodes). Most likely these torrc options are special in some way (like hidden service options) and will require a special case.

Also, I should improve the warning by providing the line that it fails on.