Sync build changes, current to r569249, modulo those modules which

don't correpond between 2.3-dev and 2.2.

Introduces ALL=1 flag that will cause the modules which are only
interesting to developers to be built.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@569261 13f79535-47bb-0310-9956-ffa450edef68