K 10 svn:author V 7 delphij K 8 svn:date V 27 2011-06-06T05:40:52.568155Z K 7 svn:log V 360 MFC r222210, 222211, 222287: - Diff reduction against NetBSD. The most notable change is to zdiff(1) to handle more file formats including bzip2 and xz. - Match symbolic link handling behavior with GNU gzip, bzip2 and xz: When we are operating on a symbolic link pointing to an existing file, bail out by default, but go ahead if -f is specified. END