CVS tadam: Update for 2.6.6 release

[FVWM CVS]

CVSROOT:        /home/cvs/fvwm
Module name:    fvwm
Changes by:     tadam   16/03/15 16:22:52

Modified files:
        .              : Tag: branch-2_6 configure.ac NEWS 

Log message:
Update for 2.6.6 release