the switch of smtpd_tls_security_level may to encrypt for submission broke smtpd_tls_protocols

The submission port began offering SSLv3.

With `encrypt`, the smtpd_tls_protocols option is ignored and smtpd_tls_mandatory_protocols must be set instead.

see e39b777a

CHANGELOG.md

@@ -5,7 +5,7 @@ In Development
 --------------
 
 * ownCloud updated to version 8.0.3.
-
+* SMTP Submission (port 587) began offering the insecure SSLv3 protocol due to a misconfiguration in the previous version.
 
 v0.09 (May 8, 2015)
 -------------------

setup/mail-postfix.sh

@@ -78,7 +78,7 @@ tools/editconf.py /etc/postfix/master.cf -s -w \
 	  -o syslog_name=postfix/submission
 	  -o smtpd_milters=inet:127.0.0.1:8891
 	  -o smtpd_tls_security_level=encrypt
-	  -o smtpd_tls_ciphers=high -o smtpd_tls_exclude_ciphers=aNULL,DES,3DES,MD5,DES+MD5,RC4 -o smtpd_tls_protocols=!SSLv2,!SSLv3
+	  -o smtpd_tls_ciphers=high -o smtpd_tls_exclude_ciphers=aNULL,DES,3DES,MD5,DES+MD5,RC4 -o smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3
 	  -o cleanup_service_name=authclean" \
 	"authclean=unix  n       -       -       -       0       cleanup
 	  -o header_checks=pcre:/etc/postfix/outgoing_mail_header_filters"