Make OpenAFS 1.6.5.1

Update configure version strings for 1.6.5.1. 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 1.6.5.1.
Switch to 1.6.6 dev 1 for macos.

Change-Id: I44a34f5c8ac3f3518da51e179db05723d3ad754a
Reviewed-on: http://gerrit.openafs.org/10317
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
Tested-by: Stephan Wiesand <stephan.wiesand@desy.de>