* Fix installation and uninstallation of Info files built in subdirectories.
* Do not run `./configure --with-included-gettext' during `make distcheck'
if AM_GNU_GETTEXT([external]) is used.
* Correctly uninstall renamed man pages.
* Do not strip escaped newline in variables defined in one condition
and augmented in another condition.
* Fix ansi2knr rules for LIBOBJS sources.
* Clean all known Texinfo index files, not only those which appear to
be used, because we cannot know wich indexes are used in included files.
(Debian Bug #168671)
* Honor only the first @setfilename seen in a Texinfo file.
* Treat "required file X not found" diagnostics as errors (exit status 1).
* Don't complain that a required file is not found when it is a Makefile
target.
* Don't use single suffix inference rules when building `.info'-less
Info files, for the sake of Solaris make.
* The `check' target now depends on `$(BUILT_SOURCES)'.
* Recognize multiple inference rules such as `.a.b .c.d:'.
* Warn about multiple inference rules when -Wportability is used.
* Fix building of deansified files from subdirectories.
* Add missing `fi' in the .c->.obj rules.
* Improve install-sh to work even when names contain spaces or certain
(but not all) shell metachars.
* Fix the following spurious failures in the test suite:
depcomp2.test, gnits2.test, gnits3.test, python3.test, texinfo13.test
* Noteworthy manual updates:
- Augment the section about BUILT_SOURCES.
- Mention that AM_PROG_CC_STDC is a relic that is beter avoided today.
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