Description of problem:
Installation of gkrellm-daemon silently fails to create group and user gkrellmd
in case group 101 already exists. On my system, group 101 is owned by user
beagleindex from package beagle:

beagleindex:x:100:101:User for Beagle indexing:/var/cache/beagle:/bin/bash

while gkrellm-daemon contains this in preinstall section:

/usr/sbin/groupadd -g 101 gkrellmd 2>/dev/null ||:
/usr/sbin/useradd -u 101 -s /sbin/nologin -M -d / -c "GNU Krell daemon" -r -g
gkrellmd gkrellmd 2>/dev/null ||:

- neither of the commands above can succeed, then. If I run it manually without
the redirection to /dev/null I get:

groupadd: GID 101 is not unique
useradd: unknown group gkrellmd

As you can see in /etc/{group,passwd} there's no gkrellmd user/group. If you
try to start gkrellmd with its default settings you get:

Starting gkrellmd: runuser: user gkrellmd does not exist
                                                           [FAILED]

Version-Release number of selected component (if applicable):
gkrellm-daemon-2.2.7-5.1

How reproducible:
Always

Steps to Reproduce:
see above
  
Actual results:
gkrellmd cannot be started

Expected results:
gkrellmd probably shouldn't want to create a group and user with explicitly
given numbers but rather use 'groupadd -r'. As for useradd, it already uses
'-r' so it's supposed to work as expected without that '-u 101'.