Pulled in from nmh. Thanks to Ken Hornstein.
If you wish to change the `configure' script or its related files, you'll need
to first install GNU m4, available from <ftp://ftp.gnu.org/pub/gnu/m4/> and then
GNU autoconf (<ftp://ftp.gnu.org/pub/gnu/autoconf/>). Nmh is currently using
-a minimum of autoconf 2.54.
+a minimum of autoconf 2.61.
Most of the configure-related files are automatically generated. The only files
you should need to manually edit are acconfig.h and configure.ac. Don't, for