add files to install as per Thomas's suggestion , and use install -D
-rw-r--r-- 725 Makefile
-rw-r--r-- 0 README
-rwxr-xr-x 308 bind
-rw-r--r-- 3645 transforward.c
-rw-r--r-- 13 transforward.conf
-rwxr-xr-x 133 transforward.init
-rw-r--r-- 193 transforward.service
-rw-r--r-- 2517 transforward.spec