CVS tadam: Bump CVS version to 2.5.31

[cvs]

CVSROOT:        /home/cvs/fvwm
Module name:    fvwm
Changes by:     tadam   10/05/09 12:40:00

Modified files:
        .              : ChangeLog NEWS configure.ac 

Log message:
Bump CVS version to 2.5.31