add shellscript to find needed functions not provided by proxmox-acme
-rw-r--r-- 35 .gitignore
-rw-r--r-- 67 .gitmodules
-rw-r--r-- 1378 Makefile
-rwxr-xr-x 455 check-missing-functions
drwxr-xr-x - debian
drwxr-xr-x - src