Make OpenAFS 1.6.5.2

Update configure version strings for 1.6.5.2. Note that macos kext
can be of form XXXX.YY[.ZZ[(d|a|b|fc)NNN]] where d dev, a alpha,
b beta, f final candidate so we have no way to represent 1.6.5.2.
Use 1.6.6 dev 2 for macos.

Change-Id: I4ab3fca89c95ad331db4b0a9823138e87f823c3b
Reviewed-on: http://gerrit.openafs.org/10586
Tested-by: Stephan Wiesand <stephan.wiesand@desy.de>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>