declare better sieve script paths per user (for after and before)

data/conf/dovecot/conf.d/60-sieve-pipeline.conf

@@ -14,8 +14,8 @@ sieve_script before2 {
   name = active
   dict proxy {
     name = sieve_before
-    sieve_script_bin_path = /var/vmail/sieve_before_bindir
   }
+  bin_path = /var/vmail/sieve_before_bindir/%{user}
 }
 
 sieve_script after {
@@ -30,8 +30,8 @@ sieve_script after2 {
   name = active
   dict proxy {
     name = sieve_after
-    sieve_script_bin_path = /var/vmail/sieve_after_bindir
   }
+  bin_path = /var/vmail/sieve_after_bindir/%{user}
 }
 
 # Personal scripts