Fix autogen.sh: find command did not work on macOS
Thanks to Ken Perry
diff --git a/autogen.sh b/autogen.sh
index e0eadec..cb55432 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -28,8 +28,8 @@
# Refresh GNU autotools toolchain.
echo Cleaning autotools files...
-find -type d -name autom4te.cache -print0 | xargs -0 rm -rf \;
-find -type f \( -name missing -o -name install-sh -o -name mkinstalldirs \
+find . -type d -name autom4te.cache -print0 | xargs -0 rm -rf \;
+find . -type f \( -name missing -o -name install-sh -o -name mkinstalldirs \
-o -name depcomp -o -name ltmain.sh -o -name configure \
-o -name config.sub -o -name config.guess -o -name config.h.in \
-o -name mdate-sh -o -name texinfo.tex \