Split all documentation into their own packages

[Gonsolo]

I own a web server with tight space (1GB). Over 300MB are in /usr,
over 25MB in /usr/share/doc. I'd like to remove all files in
/usr/share/doc but unfortunately it is not as easy as removing all
-doc packages.

Is it possible to set up a policy that all packages that have files in
/usr/share/doc should be -doc packages and split from the main
package?

Thanks for reading.

g