BUG/MINOR: cfgparse-listen: fix quoting of the condition conflict warning

BUG/MINOR: cfgparse-listen: fix quoting of the condition conflict warning

The 10 places which report the message returned by warnif_cond_conflicts()
use "'%s.\n'" as a format, so the closing quote is emitted after the \n and
ends up alone at the beginning of the next line:

  [WARNING] : parsing [x.cfg:4] : 'acl 'a' will never match ...
  '

Let's just move the quote before the LF and even the trailing '.'.

This may be backported to all supported versions.