Log Message:
tin: update to 2.4.3.

Update provided by Michael Bäuerle in wip/tin.

-- 2.4.3 release 20181224 "Glen Mhor" --

 012) Thomas E. Dickey <dickey@invisible-island.net>
      ADD. update configure macros
      ADD. check for va_copy() for pre C99 systems
      FIX. aclocal.m4, configure[.in], autoconf.h[in], tin.h, memory.c
           screen.c, string.c, tcurses.c

 011) Francisco Javier Serrador <fserrador@gmail.com>
      ADD. spanish translation
      FIX. es.po

 010) Matt Anton <tin@lv223.org>
      ADD. updated french translation
      FIX. fr.po

 009) Dennis Preiser <dennis@d--p.de>
      BUG. ensure destination of match_string() is NULL terminated
      BUG. possible buffer overflows with long translations
      BUG. fixed length buffer in rfc1522_decode() may overflow
      ADD. don't idna_decode() strings which are not IDNA encoded
      ADD. ability to filter on Path:-header
      FIX. art.c, config.c, feed.c, filter.c, getline.c, help.c, lang.c
           main.c, memory.c, nntplib.c, page.c, rfc2047.c, save.c, screen.c
           extern.h, nntplib.h, proto.h, tin.h, tin.5

 008) Urs Janssen <urs@tin.org>
      ADD. config.guess, config.sub update
      ADD. checks for explicit_bzero(), explicit_memset(), memset_s()
      ADD. check for unicode/unorm2.h to favor unorm2_normalize() over
           unorm_normalize() if found
      ADD. NFKC_case_fold normalization if unicode/unorm2.h is found
      ADD. don't strip binray with "make install"
      ADD. match_string()/match_item() now stop on first '\n'
      ADD. don't show broken active file messages if not running with -D 1
      ADD. accept arbitrary line length in mail.active file
      ADD. allow (multiple) -v for debug mode
      ADD. honor NDEBUG in assert() replacement
      BUG. possible buffer overflow when prompting for a wildcard search
           pattern in get_search_pattern()
      BUG. possible buffer overflows with long translations
      BUG. pointer arithmetic with possible NULL pointer
      BUG. didn't recheck CAPABILITIES after auth
      BUG. transport-padding on mime boundaries wasn't ignored
      BUG. get_group_from_list() used in 'L'lookup_msgid() couldn't handle
           FWS as of RFC 5536 3.1.4.
      ADD. rename FOLLOW_USEFOR_DRAFT to ALLOW_FWS_IN_NEWSGROUPLIST
      ADD. remove some redundant assigns
      ADD. switch from autoconf-2.13.20110430 to autoconf-2.52.20181006
      ADD. be more verbose on connections errors when get_tcp6_socket()
           is used (debian bug #232924)
      FIX. active.c, art.c, auth.c, config.c, cook.c, debug.c, feed.c
           getline.c, group.c, header.c, help.c, init.c, keymap.c, lang.c
           list.c, mail.c, main.c, misc.c, newsrc.c, nntplib.c, options_menu.c
           page.c, post.c, read.c, rfc1524.c, rfc2045.c, rfc2046.c, rfc2047.c
           save.c, search.c, screen.c, select.c, signal.c, sigfile.c
           strftime.c, string.c, extern.h, proto.h, tin.h, config.guess
           config.sub, aclocal.m4, configure[.in], autoconf.h[in]
           Makefile[.in], tin.1, tin.5