WUI log-section Mail: add support for postfix addon

Expand the regex for the section dmi ("Mail") for /var/log/mail to include the log contents of postfix, in case the addon is installed.

Signed-off-by: Alex Koch <ipfire@starkstromkonsument.de>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

html/cgi-bin/logs.cgi/log.dat

@@ -57,7 +57,7 @@ my %sections = (
         'cron' => '(fcron\[.*\]: )',
         'ddns' => '(ddns\[\d+\]:)',
         'dhcp' => '(dhcpd: )',
-        'dma' => '(dma: |dma\[.*\]: )',
+        'dma' => '(dma: |dma\[.*\]: |postfix/\w*\[\d*\]: )',
         'guardian' => '(guardian\[.*\]: )',
         'ipfire' => '(ipfire: )',
         'ipsec' => '(ipsec_[\w_]+: |pluto\[.*\]: |charon: |vpnwatch: )',