ipa-otpd.socket.in: Use a platform specific value for KDC service file

https://pagure.io/freeipa/issue/6845

Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Tomas Krizek <tkrizek@redhat.com>

daemons/ipa-otpd/Makefile.am

@@ -11,6 +11,7 @@ ipa_otpd_SOURCES = bind.c forward.c main.c parse.c query.c queue.c stdio.c
 
 %.socket: %.socket.in
 	@sed -e 's|@krb5rundir[@]|$(krb5rundir)|g' \
+	     -e 's|@KRB5KDC_SERVICE[@]|$(KRB5KDC_SERVICE)|g' \
 	     -e 's|@UNLINK[@]|@UNLINK@|g' \
 	     $< > $@
 

daemons/ipa-otpd/ipa-otpd.socket.in

@@ -8,4 +8,4 @@ SocketMode=0600
 Accept=true
 
 [Install]
-WantedBy=krb5kdc.service
+WantedBy=@KRB5KDC_SERVICE@