[tahoe-dev] Read only (client/gateway only) Introducer furls?

[Garonda Rodian]

As
 a newbie question regarding #68 and the Introducers in general, I know 
that a share's cap has RW, or RO, or VO.  Do Introducers have the same 
capability?  I.e. can I give some more trusted people the normal 
Introducer furl that lets them add storage nodes,
and give other less trusted people an Introducer furl that only lets 
them use existing storage nodes?





The general point of the "RO" or "client/gateway only" Introducer furl 
is to reduce the chances of a "generosity" type attack you've considered
 already - but on a network of O nodes, if an attacker (betrayer, etc.) 
gains access to a RW Introducer furl, they
could "generously" donate in excess of (N/k)*O nodes of appropriate 
values to the grid, and thus have a not unreasonable chance of 
collecting more than N-k shares of any new upload... and then taking all
 their nodes down, leaving less than k shares of those
new uploads available on the grid. 		 	   		  
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