CVS commit by ossi: 

minor security fix: add a random seed to forged "previous" session type.
fixes #62780


  M +17 -1     genkdmconf.c   1.43.2.8
  M +2 -1      kdm_config.c   1.31.2.5
  M +2 -1      kdm_config.h   1.13.2.1
  M +3 -1      kdmconfig.cpp   1.33.2.4
  M +3 -1      kdmconfig.h   1.21.2.2
  M +11 -7     kgreeter.cpp   1.83.2.9