Make usage of initscripts optional

Do not depend hard on initscript just to provide fancy colored status.
When started from systemd, it does not really matter.

Return exactly the same return code as returned by the original tool.

bind.spec

@@ -1159,6 +1159,7 @@ fi;
 %changelog
 * Wed May 20 2020 Petr Menšík <pemensik@redhat.com> - 32:9.16.3-1
 - Update to 9.16.3
+- Make initscripts just optional dependency
 
 * Mon Apr 27 2020 Petr Menšík <pemensik@redhat.com> - 32:9.16.2-4
 - Enable PKCS#11 builds again

generate-rndc-key.sh

@@ -1,6 +1,17 @@
 #!/bin/bash
 
+if [ -r /etc/rc.d/init.d/functions ]; then
 	. /etc/rc.d/init.d/functions
+else
+success() {
+	echo $" OK "
+}
+
+failure() {
+	echo -n " "
+	echo $"FAILED"
+}
+fi
 
 # This script generates /etc/rndc.key if doesn't exist AND if there is no rndc.conf
 
@@ -14,8 +25,9 @@ if [ ! -s /etc/rndc.key -a ! -s /etc/rndc.conf ]; then
     success $"/etc/rndc.key generation"
     echo
   else
+    rc=$?
     failure $"/etc/rndc.key generation"
     echo
-    exit 1
+    exit $rc
   fi
 fi