This block of code definitely belongs in apr-util, you are 100% right - but moving it to apr-util is a completely separate issue to fixing the bug as committed.
Then this 'bug' should be submitted as a bug in APR-Util, not httpd.
So far this code will only be moved in httpd v2.1/v2.2 and apr v1.0, none of the apr-util restructuring was to be backported to httpd v2.0/apr v0.9, as the LDAP stuff is experimental in v2.0 anyway (it's not experimental in v2.1/v2.2).
So, the answer still seems to get the changes into APR-Util 1.X. If it can be later back ported to 0.9.X, great, if not, hopefully we will have an httpd-2.2 release sometime soon.
