Since the flags are now stored with compatible numbering, we can
just OR them together and see whether the flag we want is in the
result.
(Net code removal!)
"unsettable" is a property of types. LINELIST_V and OBSOLETE are
unsettable, meaning that they cannot be set by name.
"contained" is a property of types. I'm hoping to find a better
name here. LINELIST_S is "contained" because it always appears
within a LINELIST_V, and as such doesn't need to be dumped ore
copied independently.
"cumulative" is a property of types. Cumulative types can appear
more than once in a torrc without causing a warning, because they
add to each other rather than replacing each other.
"obsolete" is a property of variables.
"marking fragile" is now a command that struct members can accept.
With these changes, confparse and config no longer ever need to
mention CONFIG_TYPE_XYZ values by name.
