mail/exilog: fix to be compatible with new exim msgid format
Recently exim changed msgid format, so tool does not work correctly
anymore. I tried to contact upstream but no reply so far. Also some
minor changes to make portlint happy
Exilog is very nice utility to parse and visualize logs from multiply exim
servers.
PR: ports/81899
Submitted by: Vsevolod Stakhov <vsevolod@highsecure.ru>