Function svn_config_set_bool 

pub unsafe extern "C" fn svn_config_set_bool(
    cfg: *mut svn_config_t,
    section: *const c_char,
    option: *const c_char,
    value: svn_boolean_t,
)

Like svn_config_set(), but for boolean values.

Sets the option to ‘TRUE’/‘FALSE’, depending on @a value.