Add k5start OpenRC init script

etc/init.d/k5start

@@ -0,0 +1,16 @@
+#!/sbin/openrc-run
+# vim: set ft=gentoo-init-d :
+
+: "${KRB5_KEYTAB:=/etc/krb5.keytab}"
+: "${KRB5_PRINCIPAL:=$(hostname | cut -d. -f1 | tr "a-z" "A-Z")\$}"
+: ${K5START_INTERVAL:=30}
+
+depend() {
+	before netmount
+}
+
+pidfile=/run/k5start.pid
+command=/usr/bin/k5start
+command_args="-p ${pidfile} -b -K ${K5START_INTERVAL} -f ${KRB5_KEYTAB} \
+	${KRB5_PRINCIPAL}"
+required_files="${KRB5_KEYTAB}"