Bugzilla Bug 31016

automake installs multiple versions which can be selected with
WANT_AUTOMAKE=xxx
WANT_AUTCONF has a different syntax (WANT_AUTCONF_xxx=1) which is unexpected 
and less intuitive.


Reproducible: Always
Steps to Reproduce:
1. export WANT_AUTOMAKE=1.7; emerge automake; automake --version
2. export WANT_AUTOCONF=2.5; emerge autoconf; autoconf --version
3. export WANT_AUTOCONF_2_5=1; emerge autoconf; autoconf --version


Actual Results:  
1.:
automake (GNU automake) 1.7.7
Written by Tom Tromey <tromey@redhat.com>.
...

2.:
Autoconf version 2.13

3.:
autoconf (GNU Autoconf) 2.57a
Written by David J. MacKenzie and Akim Demaille.
...


Expected Results:  
export WANT_AUTOCONF=2.5; emerge autoconf; autoconf --version

autoconf (GNU Autoconf) 2.57a
Written by David J. MacKenzie and Akim Demaille.
...


I would even more expect that "emerge autoconf" results in the installation of 
the most current autoconf as default.

Changed for autoconf-2.58.