dirent ABI and propolice bug fixes in HEAD, DragonFly_Preview tag updated

[Martin P. Hellwig]

Matthew Dillon wrote:
    The last of the major userland ABI changes are now in HEAD, along 
    with some propolice bug fixes related to -O2 compiles.

<cut>

Not that I want one but when can we expect the next ABI/API change 
requiring a rebuild of the ports in preview?

--
mph