#4 Allow "ham" as synonym for "good" in commands.

[Karl Fogel]

This patch allows "ham" as a synonym for "good" in
SpamProbe commands. For example:

$ spamprobe ham [...files...]
$ spamprobe find-ham [...files...]
$ spamprobe train-ham [...files...]

I wrote this because even though I am an experienced
SpamProbe user, I wrote "spamprobe ham" into a script
and left it running for a long time, only to discover
later that it had failed there because "ham" is not a
command. Although this was certainly my own fault, it
does seem counterintuitive that the commands say "spam"
for spam but not "ham" for ham.

However, I can also see arguments against including
these synonyms, so I'll understand if this patch can't
be committed. It's your call. I'm happy to assign
copyright if necessary, by the way.

The log message is included in the patch.

Best,
-Karl Fogel <kfogel {_AT_} red-bean.com>

[Karl Fogel]

Log message and patch to add "ham" commands.