- Update to 3.4.3

Upstream changes:
CHANGES IN R 3.4.3:

  INSTALLATION on a UNIX-ALIKE:

    * A workaround has been added for the changes in location of
      time-zone files in macOS 10.13 'High Sierra' and again in
      10.13.1, so the default time zone is deduced correctly from the
      system setting when R is configured with --with-internal-tzcode
      (the default on macOS).

    * R CMD javareconf has been updated to recognize the use of a Java
      9 SDK on macOS.

  BUG FIXES:

    * raw(0) & raw(0) and raw(0) | raw(0) again return raw(0) (rather
      than logical(0)).

    * intToUtf8() converts integers corresponding to surrogate code
      points to NA rather than invalid UTF-8, as well as values larger
      than the current Unicode maximum of 0x10FFFF.  (This aligns with
      the current RFC3629.)

    * Fix calling of methods on S4 generics that dispatch on ... when
      the call contains ....

    * Following Unicode 'Corrigendum 9', the UTF-8 representations of
      U+FFFE and U+FFFF are now regarded as valid by utf8ToInt().

    * range(c(TRUE, NA), finite = TRUE) and similar no longer return
      NA. (Reported by Lukas Stadler.)

    * The self starting function attr(SSlogis, "initial") now also
      works when the y values have exact minimum zero and is slightly
      changed in general, behaving symmetrically in the y range.

    * The printing of named raw vectors is now formatted nicely as for
      other such atomic vectors, thanks to Lukas Stadler.

(wen)