autoconf: Update to 2.71

- Update autoconf from 2.69 to 2.71
- Updated rootfile
- Changelog
Large amount of changes, especially in 2.70 - too many to add in here.
Details of changes can be found in the NEWS file in the tarball

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

config/rootfiles/common/autoconf

@@ -10,6 +10,7 @@
 #usr/share/autoconf/Autom4te/C4che.pm
 #usr/share/autoconf/Autom4te/ChannelDefs.pm
 #usr/share/autoconf/Autom4te/Channels.pm
+#usr/share/autoconf/Autom4te/Config.pm
 #usr/share/autoconf/Autom4te/Configure_ac.pm
 #usr/share/autoconf/Autom4te/FileUtils.pm
 #usr/share/autoconf/Autom4te/General.pm
@@ -37,6 +38,7 @@
 #usr/share/autoconf/autoconf/programs.m4
 #usr/share/autoconf/autoconf/specific.m4
 #usr/share/autoconf/autoconf/status.m4
+#usr/share/autoconf/autoconf/trailer.m4
 #usr/share/autoconf/autoconf/types.m4
 #usr/share/autoconf/autom4te.cfg
 #usr/share/autoconf/autoscan
@@ -46,6 +48,10 @@
 #usr/share/autoconf/autotest/autotest.m4f
 #usr/share/autoconf/autotest/general.m4
 #usr/share/autoconf/autotest/specific.m4
+#usr/share/autoconf/build-aux
+#usr/share/autoconf/build-aux/config.guess
+#usr/share/autoconf/build-aux/config.sub
+#usr/share/autoconf/build-aux/install-sh
 #usr/share/autoconf/m4sugar
 #usr/share/autoconf/m4sugar/foreach.m4
 #usr/share/autoconf/m4sugar/m4sh.m4
@@ -61,6 +67,4 @@
 #usr/share/man/man1/autoreconf.1
 #usr/share/man/man1/autoscan.1
 #usr/share/man/man1/autoupdate.1
-#usr/share/man/man1/config.guess.1
-#usr/share/man/man1/config.sub.1
 #usr/share/man/man1/ifnames.1