Add missing require line for sieve

Author: Marius Burkard

server/conf/sieve_filter.master

@@ -29,6 +29,8 @@ redirect "<tmpl_var name='address'>";
 # You can create and activate a per-user sieve script (manually or via managesieve),
 # which will execute before this.
 
+require ["fileinto", "mailbox", "regex", "date", "relational", "vacation", "imap4flags", "envelope", "subaddress", "copy", "reject"];
+
 <tmpl_if name="move_junk" op="==" value="a">
 # Move spam to spam folder
 if anyof (header :contains "X-Spam-Flag" "YES", header :contains "X-Spam" "Yes", header :contains "subject" "*** SPAM ***", header :contains "subject" "***SPAM***") {