  * Allow environment override of more variables (including the new
    USE_UTF8 and IGNORE_?ID_*).
  * Merge the upstream forked ads scripts, and use a flag instead.
  * Support ~/.migrationtools.ph file overriding site defaults.
  * Offer to strip (as alternative to recode) unsupported characters.
  * Interactively ask about recoding/stripping (and only if needed).
  * Use prefix {md5} for passwords starting with $1$, and {CRYPT} only
    as fallback. Closes: bug#400343, thanks to Michael Burschik.
  * Generate only one entry for each service (suppressing multiple ones,
    eg. when both udp and tcp variants of a service is parsed). This
    closes: bug#307618, thanks to gary ng.
  * Use unusual object classes only optionally:
    - nisMailAlias (uses non-default misc scheme)
    - krb5Principal (uses unofficial and discouraged krb5-kdc scheme)
    This closes bug#307616, thanks to gary ng.
  * Investigate the dependency on perl: We don't use any modules, so
    perhaps perl-base (which is required, so no to declare) is enough?
