feat(fetchmail): added fetchmail

cron job to run fetchmail script to get fetchmail config from roundcube
mysql database.

MR !1

include/docker-entrypoint.sh

@@ -31,6 +31,8 @@ do
 done
 
 
+mkdir -p /var/lock/fetchmail
+
 if [ "$1" == "setup" ]; then
 
 

include/etc/cron.d/fetchmail

@@ -0,0 +1,7 @@
+#
+#  SpamAssassin Bayes learning from mailboxes 
+#
+# m h dom mon dow user  command
+#1,31 *	* * *	root	if [ "0$USE_FETCHMAIL_PL" != "0" ]; then /bin/fetchmail.pl 2>&1; fi
+1,31 *	* * *	root	if [ "0$USE_FETCHMAIL_PL" != "0" ]; then echo /bin/fetchmail.pl 2>&1; fi
+

include/etc/mail/postfixadmin/fetchmail.conf

@@ -0,0 +1,24 @@
+# database settings
+
+# database backend - uncomment one of these
+our $db_type = 'mysql';
+#my $db_type = 'mysql';
+
+# host name
+our $db_host="mysql";
+# database name
+our $db_name="roundcube";
+# database username
+our $db_username="roundcube";
+# database password
+our $db_password="roundcube";
+
+# Where to create a lockfile; please ensure path exists.
+our $run_dir="/var/lock/fetchmail";
+
+# in case you want to use dovecot deliver to put the mail directly into the users mailbox,
+# set "mda" in the fetchmail table to the keyword "dovecot".
+
+# Where the delivery binary is located
+$dovecot_deliver = "/usr/lib/dovecot/dovecot-lda";
+