how can I add custom lintian checks?

[Eric Cooper <ecc@cmu.edu>]

I'm interested in adding some additional lintian checks (in this case,
to verify conformance with the OCaml packaging policy).

I was surprised to not find any packages providing "policy plugins"
for Perl, Java, Emacs, etc., other than what's provided by lintian
itself.

Is there any way to specify adding additional directories for checks
and collectors, rather than overriding the entire set with the
"--root" option?  I'd appreciate it if anyone could point me at what
I'm missing, as well as any examples, etc. to get started.  Thanks.

-- 
Eric Cooper             e c c @ c m u . e d u