zic warnings about odd time zone abbreviations

[Robert Elz]

    Date:        Tue, 24 May 2005 13:33:56 -0400 (EDT)
    From:        Arthur David Olson <olsona at lecserver.nci.nih.gov>
    Message-ID:  <200505241733.j4OHXudh010801 at lecserver.nci.nih.gov>

  | Here are changes to zic.c to produce warnings about non-POSIX time zone
  | abbreviations.

That's fine, but doesn't address the real problem (admins putting
weirdness in their zone source files was never really the issue), it
is users putting "bad stuff" in their private zone files or
TZ env vars that might be important - warnings don't help, run time
enforcement of at least safety, if not sanity, is needed.

kre