* lib/Autom4te/Configure_ac.pm (find_configure_ac): Use `$configure_in' instead of `configure.in', to preserve directory component. * lib/Automake/Configure_ac.pm: Add note that Automake owns this file. * lib/Automake/Channels.pm: Likewise. * lib/Automake/FileUtils.pm: Likewise. * lib/Automake/Struct.pm: Likewise.