cvs-flags-query is a compiled Lisp function in `
(cvs-flags-query SYM &optional DESC ARG)
Query flags based on SYM.
Optional argument DESC will be used for the prompt.
If ARG (or a prefix argument) is nil, just use the 0th default.
If it is a non-negative integer, use the corresponding default.
If it is a negative integer, query for a new value of the corresponding
default and return that new value.
If it is C-u, just query and return a value without
altering the defaults.
If it is C-u C-u, behave just
as if a negative zero was provided.