misc: update year in copyright lines This patch also makes some expected output lines in tests glob-ed for persistence of them. BTW, files below aren't yet changed in 2017, but this patch also updates copyright of them, because: - mercurial/help/hg.1.txt almost all of "man hg" output comes from online help of hg command, and is already changed in 2017 - mercurial/help/hgignore.5.txt - mercurial/help/hgrc.5 "copyright 2005-201X Matt Mackall" in them mentions about copyright of Mercurial itself