maintainer-feedback requested: [Bug 257084] www/firefox-esr: fix build when archivers/star is installed.

Robert Clausecker <fuz@fuz.su> has asked freebsd-gecko (Nobody)
<gecko@FreeBSD.org> for maintainer-feedback:
Bug 257084: www/firefox-esr: fix build when archivers/star is installed.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=257084



--- Description ---
Created attachment 226326
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=226326&action=edit
www/firefox-esr: do not use gnutar over tar

archivers/star installs a binary named gnutar which is not
sufficiently GNU tar compatible to work with this build scipt.
Make sure the build scripts use /usr/bin/tar as a tar program
and not some random other command on the system.

This addresses an issue reported in bug #257063 where the newly
updated archivers/star port now installs a binary named gnutar.
As an additional measure against such surprises, archivers/star
will be changed to make installing a gnutar binary a non-default
option.