fix(rngd): install system service file

as there's no reason to keep a copy; there shouldn't be any modifications.

In case there are args stored in a separate file (Fedora and alike),
it needs to be supplied too, but without the option to change the user.

(Cherry-picked commit: c47a44cb25c0892d9af6e66ee9d7cd2c3beca31f)

Resolves: #2181543

modules.d/06rngd/module-setup.sh

@@ -32,7 +32,14 @@ check() {
 
 install() {
     inst rngd
-    inst_simple "${moddir}/rngd.service" "${systemdsystemunitdir}/rngd.service"
+    inst_simple "${systemdsystemunitdir}/rngd.service"
+
+    if [ -r /etc/sysconfig/rngd ]; then
+      inst_simple "${moddir}/sysconfig" "/etc/sysconfig/rngd"
+    fi
+
+    # make sure dependant libs are installed too
+    inst_libdir_file opensc-pkcs11.so
 
     systemctl -q --root "$initdir" add-wants sysinit.target rngd.service
 }

modules.d/06rngd/sysconfig

@@ -0,0 +1 @@
+RNGD_ARGS="--fill-watermark=0 -x pkcs11 -x nist -x qrypt"