[InterNetNews/inn] ae4cac: Fix more Clang warnings, and add support for them

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: ae4cac112944e42cda72c880baa8e64eb457ee84
      https://github.com/InterNetNews/inn/commit/ae4cac112944e42cda72c880baa8e64eb457ee84
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2021-12-19 (Sun, 19 Dec 2021)

  Changed paths:
    M authprogs/ident.c
    M authprogs/radius.c
    M backends/actsync.c
    M backends/archive.c
    M backends/batcher.c
    M backends/buffchan.c
    M backends/cvtbatch.c
    M backends/innbind.c
    M backends/inndf.c
    M backends/innxbatch.c
    M backends/innxmit.c
    M backends/ninpaths.c
    M backends/nntpget.c
    M configure.ac
    M contrib/expirectl.c
    M contrib/mlockfile.c
    M contrib/newsresp.c
    M contrib/pullart.c
    M contrib/respool.c
    M expire/convdate.c
    M expire/expire.c
    M expire/expireover.c
    M expire/makedbz.c
    M expire/makehistory.c
    M expire/prunehistory.c
    M frontends/ctlinnd.c
    M frontends/getlist.c
    M frontends/inews.c
    M frontends/innconfval.c
    M frontends/ovdb_monitor.c
    M frontends/rnews.c
    M innd/innd.c
    M innd/tinyleaf.c
    M innd/util.c
    M innfeed/article.c
    M innfeed/configfile.h
    M innfeed/configfile.l
    M innfeed/configfile.y
    M innfeed/connection.c
    M innfeed/connection.h
    M innfeed/endpoint.c
    M innfeed/endpoint.h
    M innfeed/host.c
    M innfeed/host.h
    M innfeed/imap_connection.c
    M innfeed/innfeed.h
    M innfeed/innlistener.c
    M innfeed/innlistener.h
    M innfeed/main.c
    M innfeed/misc.c
    M innfeed/misc.h
    M innfeed/tape.c
    M innfeed/tape.h
    M lib/network-innbind.c
    M lib/snprintf.c
    M nnrpd/article.c
    M nnrpd/commands.c
    M nnrpd/line.c
    M nnrpd/misc.c
    M nnrpd/newnews.c
    M nnrpd/nnrpd.c
    M nnrpd/nnrpd.h
    M nnrpd/perl.c
    M nnrpd/perm.c
    M nnrpd/post.c
    M nnrpd/post.h
    M nnrpd/python.c
    M nnrpd/sasl.c
    M nnrpd/tls.c
    M nnrpd/tls.h
    M storage/ovsqlite/ovsqlite-server.c
    M storage/ovsqlite/sql-main.sql
    M storage/ovsqlite/sqlite-helper-gen.in
    M storage/tradindexed/tdx-util.c
    M tests/innd/artparse-t.c
    M tests/innd/chan-t.c
    M tests/innd/fakeinnd.c
    M tests/lib/dispatch-t.c
    M tests/lib/wire-t.c
    M tests/util/innbind-t.c

  Log Message:
  -----------
  Fix more Clang warnings, and add support for them