autogen.sh: use AUTORECONF enironment variable for versioned autoreconf

darcs-hash:20060817182326-65a35-33634d0b0ded940e70aa400728b5a2c13a06fcde.gz

autogen.sh

 #!/bin/sh 
 
 set -x
-autoreconf -i
+${AUTORECONF:-autoreconf} -i
 find . \( -name 'run*' -o -name '*.sh' \) -a -type f | xargs chmod +x
 chmod +x scripts/*