4bde407
rename configure.in to configure.ac Fix: autoupdate-2.71: warning: autoconf input should be named 'configure.ac', not 'configure.in' Signed-off-by: Thomas Kuehne <thomas@kuehne.cn> (cherry picked from commit 6e4e5bc1c7285e77df837d4b0c3e5a82779df778)