patch 8.0.0082
Problem:    Extension for configure should be ".ac".
Solution:   Rename configure.in to configure.ac. (James McCoy, closes #1173)
diff --git a/Filelist b/Filelist
index 7334e5e..ea6f2e2 100644
--- a/Filelist
+++ b/Filelist
@@ -207,7 +207,7 @@
 		src/config.mk.dist \
 		src/config.mk.in \
 		src/configure \
-		src/configure.in \
+		src/configure.ac \
 		src/gui_at_fs.c \
 		src/gui_at_sb.c \
 		src/gui_at_sb.h \