There's a lot of cruft in 2.3/2.4 that, imo at least, doesn't belong in a 2011-era codebase. For example, 2.3/2.4 should *require* support for threads, and shared-memory and other such stuff that we test for and work around.
This is stupid. Even with prefork, we should require that APR was built with thread support. In other words, if APR wasn't built with threads (and shared mem, etc), then httpd shouldn't run in any case. I propose that this low-hanging fruit be picked...
