Preforked imap and lmtp services to speed things up; added default sieve script to sort away spam

Makefile

-all: cyrus-config imapd-config cyrus-imapd-service services
+all: cyrus-config imapd-config cyrus-imapd-service services default-sieve
 	rm /etc/passwd
 	mv -v /data/etc/passwd /etc/passwd
 	rm /etc/group
@@ -28,6 +28,7 @@ all: cyrus-config imapd-config cyrus-imapd-service services
 	@echo "$$SERVICES" >> /etc/services
 	@echo "$$CYRUS_CONFIG" > /etc/cyrus.conf
 	@echo "$$IMAPD_CONFIG" > /etc/imapd.conf
+	@echo "$$DEFAULT_SIEVE" > /etc/default/sieve
 	install -v -m750 -o cyrus -g mail -d /var/lib/cyrus
 	install -v -m750 -o cyrus -g mail -d /var/spool/cyrus
 	install -v -m750 -o cyrus -g mail -d /var/spool/sieve
@@ -58,11 +59,11 @@ START {
 # UNIX sockets start with a slash and are put into /var/lib/cyrus/socket
 SERVICES {
   # add or remove based on preferences
-  imap          cmd="imapd" listen="imap" prefork=0
+  imap          cmd="imapd" listen="imap" prefork=3
   imaps         cmd="imapd -s" listen="imaps" prefork=0
   pop3          cmd="pop3d" listen="pop3" prefork=0
   pop3s         cmd="pop3d -s" listen="pop3s" prefork=0
-  sieve         cmd="timsieved" listen="sieve" prefork=0
+  sieve         cmd="timsieved" listen="sieve" prefork=1
 
   # these are only necessary if receiving/exporting usenet via NNTP
 #  nntp          cmd="nntpd" listen="nntp" prefork=0
@@ -74,7 +75,7 @@ SERVICES {
 
   # at least one LMTP is required for delivery
 #  lmtp          cmd="lmtpd" listen="lmtp" prefork=0
-  lmtpunix      cmd="lmtpd" listen="/var/lib/cyrus/socket/lmtp" prefork=0
+  lmtpunix      cmd="lmtpd" listen="/var/lib/cyrus/socket/lmtp" prefork=1
 
   # this is requied if using socketmap
 #  smmap         cmd="smmapd" listen="/var/lib/cyrus/socket/smmap" prefork=0
@@ -309,7 +310,7 @@ autocreate_sieve_folders: Drafts | Sent | Junk | Trash
 #    #
 #    When this option is not defined, no default sieve filter is created.
 #    The file must be readable by the Cyrus daemon. 
-#autocreate_sieve_script: <none>
+autocreate_sieve_script: /etc/default/sieve
 
 #  Autocreate_sieve_script_compile
 #  -------------------------------
@@ -387,3 +388,14 @@ smmap           2004/tcp # Cyrus smmapd (quota check) service
 csync           2005/tcp # Cyrus replication service
 endef
 export SERVICES
+
+default-sieve:
+define DEFAULT_SIEVE
+require "fileinto";
+
+if header :is "X-Spam-Flag" "Yes"
+{
+    fileinto "Junk";
+}
+endef
+export DEFAULT_SIEVE