Update v-add-mail-domain-dkim

Escape semicolons (;) in _domainkey policy; breaks dns-cluster updates

bin/v-add-mail-domain-dkim

@@ -71,7 +71,7 @@ fi
 if [ ! -z "$DNS_SYSTEM" ] && [ -e "$USER_DATA/dns/$domain.conf" ]; then
     p=$(cat $USER_DATA/mail/$domain.pub |grep -v ' KEY---' |tr -d '\n')
     record="_domainkey"
-    policy="\"t=y; o=~;\""
+    policy="\"t=y\; o=~\;\""
     $BIN/v-add-dns-record $user $domain $record TXT "$policy" '' '' 'no'
 
     record="mail._domainkey"