[InterNetNews/inn] cca00e: ctlinnd: fix feedinfo command for all sites

[Julien ÉLIE]

  Branch: refs/heads/2.7
  Home:   https://github.com/InterNetNews/inn
  Commit: cca00ead83bbb27b2130810301cfbf404a6636f3
      https://github.com/InterNetNews/inn/commit/cca00ead83bbb27b2130810301cfbf404a6636f3
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2022-09-10 (Sat, 10 Sep 2022)

  Changed paths:
    M doc/pod/news.pod
    M innd/site.c

  Log Message:
  -----------
  ctlinnd: fix feedinfo command for all sites

ctlinnd feedinfo '' returned information only for the first site.  A spurious
"\0" was introduced after the generation of the information for each site.