plain variables. This means that `setopt' will execute any
`custom-set' form associated with VARIABLE.
+Note that `setopt' will emit a warning if the type of a VALUE
+does not match the type of the corresponding VARIABLE as
+declared by `defcustom'. (VARIABLE will be assigned the value
+even if it doesn't match the type.)
+
\(fn [VARIABLE VALUE]...)"
(declare (debug setq))
(unless (zerop (mod (length pairs) 2))