Revert ab340f7f - it no longer makes sense given the excellent CI setup

Revert ab340f7f - it no longer makes sense given the excellent CI setup

There should be no functional changes / difference in behavior (the config
option is named differently, and is inverted in meaning)

Verified no change in behavior (at least on CI) via:
( not checking all 20+ jobs as the log-counter jumps towards the end )

for n in $(seq 18) ; do
  x=$((112787688 + $n)) && \
  y=$((112787738 + $n)) && \
  echo "$x => $y" && \
  diff -U0 \
    <(wget -qO- https://s3.amazonaws.com/archive.travis-ci.org/jobs/$x/log.txt | \
      perl -0777 -n -E 'say ( ($_ =~ /List of loadable modules within both the core and(.+?)List of loadable modules within both the core and/s )[0] )') \
    <(wget -qO- https://s3.amazonaws.com/archive.travis-ci.org/jobs/$y/log.txt | \
      perl -0777 -n -E 'say ( ($_ =~ /List of loadable modules within both the core and(.+?)List of loadable modules within both the core and/s )[0] )')
done | less

This also happened to find https://rt.cpan.org/Ticket/Display.html?id=112601