postfix initscript no longer works, so just call posfix directly

Author: JedMeister

conf/turnkey.d/postfix-local

@@ -30,6 +30,6 @@ postconf -e smtpd_tls_mandatory_ciphers=medium
 # ciphers set by common/conf/turnkey.d/zz-ssl-ciphers
 postconf -e tls_medium_cipherlist="ZZ_SSL_CIPHERS"
 
-service postfix start
+postmulti -x postfix start
 systemctl enable postfix@-.service
-service postfix stop
+postmulti -x postfix stop