Add Oracle Messaging Server filter

My Github skills are low.  However, I think that I have the two files needed here, the new filter and the test cases.  The modifications to jail.conf, however, I can't figure out how to add to this pull request.  A few lines have to be added to jail.conf.  Note that no "port" argument is here because the server listens on a wide variety of ports, all subject to modification by the system manager (including 25, 110, 143, 993, 995 typically plus commonly others such as 587)

```
# /opt/sun/comms/messaging64/log is the default
# location for Linux installations, but this may vary
# depending on the system manager's configuration and
# how the application was installed.
# Because of how mail clients work, it is desirable to
# have a more "generous" maxretry for this application
# than others. Anything 5 or less is likely to create
# false positives.
[oracleims]

enabled = false
logpath = /opt/sun/comms/messaging64/log/mail.log_current
maxretry = 6
```