tin: Update to 2.4.4

Changes:
-- 2.4.4 release 20191224 "Millburn" --

 017) Dennis Grevenstein <dennis.grevenstein@gmail.com>
      ADD. FD_*-fallback for SunOS-3.5
      FIX. missing_fd.h

 016) Thomas E. Dickey <dickey@invisible-island.net>
      ADD. update configure macros - use xpg3 instead of xpg4 case-statements
      FIX. aclocal.m4, configure[.in]

 015) Dennis Preiser <dennis@d--p.de>
      BUG. 'L'ookupMessageID in select-level could crash if 1st group
           in newsrc is marked bogus
      BUG. memleak in thread_by_multipart
      FIX. active.c, art.c, tin.5

 014) Urs Janssen <urs@tin.org>
      BUG. sigfile attribute with a command ("sigfile=!") would append %G
           on {ATTRIBUTES,TINRC}_VERSION increase even if already present.
      BUG. tinrc normalization_form=5 (NFKC_CF) setting was lost on restart
      BUG. quote_chars with multiple '%s' lead to a crash
      BUG. memleak with stray comments (no scope) in filter file
      ADD. tweak is_art_tex_encoded to allow text umlauts at the beginning
           of a line
      ADD. turned '%s'/'%S' in quote_chars (for initials) into '%I' to be
           consistent with other occurrences
      ADD. repost ('x') now takes mailing_list attribute into account
      ADD. repost prolog looked ugly in multibyte env. if multibyte chars
           were quoted in the prolog
      ADD. disallow supersedes in mailgroups
      ADD. fix handrolled strcasestr() to cast returned value
           (required for cray-unicos cc)
      ADD. configure check for working tolower(), toupper()
           (required for sony-newsos3)
      ADD. configure check for h_addr_list in struct hostent
           (required for sun-sunos3.5)
      ADD. CF_TYPE_FD_SET and CF_CHECK_FD_SET configure checks from
           Thomas E. Dickey
      ADD. fixup autoconf missdetections for *-next-{nextstep,openstep}*
           (WIFEXITED, WIFEXITED, HAVE_SYS_UTSNAME_H, HAVE_SYS_WAIT_H, ...)
      ADD. determine mailbox_name just once
      ADD. switched tinrc.confirm_choice from string to int
      ADD. invoke_metamail() without piping
      ADD. %P expansion (groupname with '.' replaced by '/') in _strfpath()
      ADD. check for gcc >= 2.6 to use __attribute__((unused))
      ADD. GLOBAL_BUGREPORT ('R') to 'M'enu and attachment menu
      ADD. normalize subject for threading
      ADD. xref and path to debug filter output if set and hide subject,
           from and msgid if unset
      ADD. article headers and body to very verbose nntp debug (-D 1 -vv) log
      ADD. score, gnksa and lines to arts debug output for killed articles
      REM. dead code (NEW_HASH_METHOD, gl_init_done, OSNAME, redundant
           conditions)
      REM. non M_UNIX and __BEOS__ code
      ADD. config.guess, config.sub update
      FIX. active.c, art.c, attrib.c, charset.c, config.c, cook.c, curses.c
           debug.c, feed.c, filter.c, getline.c, header.c, inews.c, init.c
           keymap.c, lang.c, list.c, makecfg.c, main.c, mimetypes.c, misc.c
           newsrc.c, nntplib.c, nrctbl.c, options_menu.c, page.c, post.c
           prompt.c, read.c, rfc2046.c, rfc2047.c, save.c, screen.c, select.c
           sigfile.c, signal.c, string.c, version.c, xref.c, bugrep.h, extern.h
           proto.h, tin.h, tnntp.h, version.h, parsdate.y, Makefile[.in]
           config.guess, config.sub, configure[.in], autoconf.hin, tin.1, tin.5

 013) Toomas Soome <tsoome@me.com>
      ADD. updated estonian translation
      FIX. et.po


(leot)