- upstream update to 3.4.2
CHANGES IN R 3.4.2:
  NEW FEATURES:
    * Setting the LC_ALL category in Sys.setlocale() invalidates any
      cached locale-specific day/month names and the AM/PM indicator
      for strptime() (as setting LC_TIME has since R 3.1.0).
    * The version of LAPACK included in the sources has been updated to
      3.7.1, a bug-fix release.
    * The default for tools::write_PACKAGES(rds_compress=) has been
      changed to "xz" to match the compression used by CRAN.
    * c() and unlist() are now more efficient in constructing the
      names(.) of their return value, thanks to a proposal by Suharto
      Anggono.  (PR#17284)
  UTILITIES:
    * R CMD check checks for and R CMD build corrects CRLF line endings
      in shell scripts configure and cleanup (even on Windows).
  INSTALLATION on a UNIX-ALIKE:
    * The order of selection of OpenMP flags has been changed: Oracle
      Developer Studio 12.5 accepts -fopenmp and -xopenmp but only the
      latter enables OpenMP so it is now tried first.
  BUG FIXES:
    * within(List, rm(x1, x2)) works correctly again, including when
      List[["x2"]] is NULL.
    * regexec(pattern, text, *) now applies as.character(.) to its
      first two arguments, as documented.
    * write.table() and related functions, writeLines(), and perhaps
      other functions writing text to connections did not signal errors
      when the writes failed, e.g. due to a disk being full.  Errors
      will now be signalled if detected during the write, warnings if
      detected when the connection is closed.  (PR#17243)

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