Description of problem:

wycliff:spool# sh -x /etc/cron.daily/slrnpull-expire 
+ umask 022
+ '[' -d /var/spool/slrnpull ']'
+ exec runuser news -c 'slrnpull --expire'
This account is currently not available.


Version-Release number of selected component (if applicable):
slrn-1.0.0-0.1.pre1.0.0.41.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.see above
2.
3.
  
Actual results:
The error message and slrnpull --expire is acutally not run

Expected results:
automagically expired directories

Additional info:
The problem is obviously in the status of the news user:

matej@wycliff: ~$ grep news /etc/passwd
news:x:990:983:News server user:/etc/news:/sbin/nologin
matej@wycliff: ~$ 

news user has (as it should) /sbin/nologin as its login shell, which runuser doesn't like. Suggested patch attached.