OpenBSD/ports VpEzIYLwww/firefox-esr Makefile distinfo

   MFC: update to firefox-esr 52.6.0.

   See https://www.mozilla.org/en-US/firefox/52.6.0/releasenotes/
   Fixes https://www.mozilla.org/en-US/security/advisories/mfsa2018-01/
   (spectre mitigations) and
   https://www.mozilla.org/en-US/security/advisories/mfsa2018-03/

   6.2 packages for i386 & amd64 at the usual place.
VersionDeltaFile
1.64.2.4+2-2www/firefox-esr/Makefile
1.46.2.4+2-2www/firefox-esr/distinfo
+4-42 files

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