FreeBSD/src afb91be (r328318)contrib/tzdata NEWS europe

Import tzdata 2018c

Changes: https://github.com/eggert/tz/blob/2018c/NEWS

MFC after:      3 days
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+46-0contrib/tzdata/NEWS
+29-8contrib/tzdata/europe
+27-0contrib/tzdata/pacificnew
+14-11contrib/tzdata/Makefile
+10-10contrib/tzdata/asia
+10-5contrib/tzdata/leap-seconds.list
+3-3contrib/tzdata/zishrink.awk
+2-2contrib/tzdata/leapseconds
+1-1contrib/tzdata/README
+1-1contrib/tzdata/theory.html
+1-1contrib/tzdata/version
+144-4211 files

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