When adding xz as third compression format in May 2014 I mentioned that I'm
going to remove bzip2 in favor of xz in 1.12.
I heard no complains but I left it in for 1.12. With 1.13 starting its time
to remove it. From now on it will be only gz and xz compressed tarballs.
AC_USE_SYSTEM_EXTENSIONS
-AM_INIT_AUTOMAKE([1.11 dist-bzip2 dist-xz -Wall])
+AM_INIT_AUTOMAKE([1.11 dist-xz -Wall])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])