Generate a valid config.h even if stdarg.h and varargs.h are both missing.
-rw-r--r-- .gitignore
-rw-r--r-- .package
-rw-r--r-- Makefile.PL
-rw-r--r-- README
-rw-r--r-- README_U
drwxr-xr-x U.check
drwxr-xr-x U
drwxr-xr-x bin
-rwxr-xr-x make-dist.pl
-rw-r--r-- metaconfig.html