That has been long time on my todo (hello Stas! :-) There's a new module I'd like to add to the core distribution. It makes use of the new httpd version query function (ap_get_server_revision). It introduces <IfVersion> containers, where you can depend your config on a particular httpd version. I consider this as a very useful feature for test suites and big companies, which typically switch smoothly between versions.
I've uploaded the module here: <http://cvs.apache.org/~nd/mod_version.c>. The are some more detailed descriptions at the beginning of the file after the license. What do you think? nd