specification of wordlist directory

[David Relson]

Matthias,

I've been thinking about directory names and here's what I remember:

1. If BOGOFILTER_DIR is defined, remember its value.
2. If not defined, check for HOME and remember its value.
3. When parsing the command line, "-d directory" can supercede any prior value.

So, neither environment variable is required and bogofilter shouldn't 
complain if neither is defined.  Bogofilter _should_ complain if there's no 
directory specified when it's time to open the wordlists.

Lastly, I've now made it possible to specify the directory name in the 
config file.  I'm thinking that config file takes precedence over 
environment variable and that command line takes precedence over config file.

Assuming that the above is right, we need to change the code to make it 
work in this manner.

There's an additional, older idea still around.  Bogofilter has code to 
work with a list of wordlists, i.e. more than just the two normally 
used.  At one time, using multiple "-d directory" switches on the command 
line would add pairs of good/spam wordlists for use in calculating a word's 
spamicity score.  We could allow multiple config file lines to name 
directories.  Doing this would allow an admin to configure a system 
wordlist plus allowing users to have their own wordlists.  Do we want to 
disable this or to fully enable it?

Cheers!

David