[ maintainer-update ] upgrade to version 0.6.6

New feature to 'fold' select columns in main display so you
can see more of the WHERE clause. Use the F key to fold or
the --fold option from the command line. Also, includes
mkill.PL which was missing from the v0.6.5 distribution.

PR: ports/71978
Submitted by: Lester Mesa <lesterm@mazpe.net>