elinks: Update to version 0.17.1.1

elinks: Update to version 0.17.1.1

- Update from version 0.16.0 to 0.17.1.1
- Update of rootfile not required
- elinks now requires libidn2 as a run time dependency in place of libidn. libidn is also
   required by ghostscript. If the cups removal patch is accepted, which also removes
   ghostscript, then at the same time libidn can be removed.
- The addition of libidn2 is in another patch combined with this one.
- Changelog
    0.17.1.1
	* bump requirements: libCSS to 0.9.2 and libdom to 0.4.2
	* revert "[head] addcrlf". #281
	* main, article and nav elements #282
	* bashism in configure.ac #285
	* eliminate GNUism in sed #305
	* python module imp is deprecated #313
	* fix hooks.py detection #333
	* cast to unsigned char * in inpfield #315
	* fix suspend in session master when fork_on_start #296
	* remove 300ms startup delay and optimize fork_on_start #297
	* missing <sys/cdefs.h> on systems with musl libc #306
    0.17.0
	* fix for some 32-bit systems and select-only builds
	* fix for gettext in Windows builds
    0.17.0rc1
	* configuration files are now saved to ~/.config/elinks/ or
	  $XDG_CONFIG_HOME/elinks/ #199
	  User must copy files from ~/.elinks/ to ~/.config/elinks/ himself or herself
	* HOME_ETC support was dropped, you can set ELINKS_CONFDIR instead
	* idn2 in place of idn #206
	* libcss support (a few netsurf's libraries are required). Set
	  document.css.libcss = 1 to enable
	* experimental libsixel support (image/*; img2sixel %s; copiousoutput) in
	  ~/.mailcap
	  Must be enabled in a few places in configuration: set document.plain.sixel = 1
	  and in terminal options. Do not try it on metered remote connections
	* testing libcurl support (explicit FTPS and SFTP among others)
	  To enable set protocol.ftp.use_curl = 1
	  set protocol.http.use_curl = 1 for http/https
	* ui.sessions.postpone_unlink option. Delete temporary files at exit instead
	  of immediately after
	  closing viewer #257
	* redefined isspace #249
	* Serbian translation update
	* compilation fixes
    0.16.1.1
	* updated POTFILES #230
    0.16.1
	* handle SECTION html element #207
	* allocate more memory for BLOCKQUOTE #214
	* encode A href to terminal codepage and encode bytes with highest bit set as
	  %HEX #221
	* Serbian translation update
	* install doc by default in meson #224
	* tests fixes

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>