texinfo: Update to version 7.2

texinfo: Update to version 7.2

- Update from version 7.1.1 to 7.2
- Update of rootfile
- Changelog
    7.2
	* Build
	  . "make install" installs files for texi2any under $datadir/texi2any, not
	    $datadir/texinfo.
	* texinfo.tex
	  . use @ as the escape character in all index files.  this requires
	    new enough texi2dvi (Texinfo 6.7, 2019) for index files to be
	    properly processed.
	  . a bug has been fixed where a mangled PDF outline could be produced for
	    a document using @unnumberedsec
	  . you can call @unmacro with an undefined macro name, matching the
	    behavior of texi2any
	* texi2any
	  . set CHECK_NORMAL_MENU_STRUCTURE by default.  this means texi2any
	    again checks menu structure by default (changed in 6.8 release, 2021).
	  . only allow @definfoenclose to be used to redefine highlighting commands
	  . sorting of indices is now independent of the input or output encodings
	  . new customization variable COLLATION_LANGUAGE to allow linguistic
	    tailoring of index sorting
	  . new variable DOCUMENTLANGUAGE_COLLATION to use @documentlanguage for
	    linguistic tailoring of index sorting
	  . new variable USE_UNICODE_COLLATION to allow turning off the slower
	    use of Unicode collation when sorting indices
	  . rename BODYTEXT customization variable to BODY_ELEMENT_ATTRIBUTES
	  . rename COMPLEX_FORMAT_IN_TABLE customization variable to
	    INDENTED_BLOCK_COMMANDS_IN_TABLE
	  . remove the following variables: AVOID_MENU_REDUNDANCY, FRAMES,
	    FRAMESET_DOCTYPE, NO_USE_SETFILENAME, SILENT, USE_UP_NODE_FOR_ELEMENT_UP
	  . remove SIMPLE_MENU variable and tree transformation
	  . the use of the directories ~/.texinfo and ~/.texi2any for configuration
	    files is deprecated, and should be replaced by texinfo or texi2any
	    directories under XDG_CONFIG_HOME (usually ~/.config/).  the new
	    locations are compatible with the XDG Base Directory Specification.
	    in future versions, the ~/.texinfo and ~/.texi2any directories will
	    not be in search paths.
	  . do not try the us-ascii encoding anymore as a locale for translated
	    document strings.
	  . some unused translation files have been removed for the
	    `texinfo_document' domain
	  . Info output:
	      . output Info-documentlanguage in Local Variables section of output
	        file if @documentlanguage is given
	  . HTML, Texinfo and raw text output:
	      . an implementation of the conversion in C has been included, which
	        is much faster than the code in Perl. set the `TEXINFO_XS_CONVERT'
	        environment variable to 1 to use.
	  . HTML output:
	      . CHECK_HTMLXREF set by default for warnings about links to unknown
	        external manuals
	      . you can use the MATHJAX_CONFIGURATION customization variable to add
	        data to the MathJax configuration object
	      . warn if there is a .inf or .info suffix for cross-reference manual
	      . use <pre> instead of <div><em> for output of @displaymath
	      . remove border, cellpadding, cellspacing and align attributes.  add
	        classes and use CSS when needed.
	  . EPUB output:
	      . stricter conformance for conformance checkers
	* info
	  . check for init file under XDG_CONFIG_HOME/texinfo/infokey after
	    checking ~/.infokey, in accordance with the XDG Base Directory
	    Specification
	* Distribution
	  . automake 1.17, autoconf 2.72, gettext 0.22.5, libtool 2.5.3

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