Warnings about rcs_id strings: let's settle this

[Gabriel Dos Reis]

Phil Edwards <phil@jaj.com> writes:

| For people who haven't been reading that other exploding thread:  here
| are some actual data from actual users:

Whatever is decided for the unused variable, we need to say something
clear about -Wall.  This is not the first time we're getting
discusions about -Wall because a new warning was added (or removed).


-- Gaby