Rename .texinfo files to .texi to get rid of the autogen.sh warning.

I am wondering if anybody still uses the content of this directory.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23344 57a11ea4-9604-0410-9ed3-97b8803252fd

src/doc/design/Makefile.am

@@ -1,17 +1,17 @@
 
-info_TEXINFOS = gnucash-design.texinfo
+info_TEXINFOS = gnucash-design.texi
 gnucash_design_TEXINFOS = \
-  component-manager.texinfo \
-  concept-index.texinfo \
-  engine.texinfo \
-  fdl.texinfo \
-  function-index.texinfo \
-  intro.texinfo \
-  register.texinfo \
-  reports.texinfo \
-  top-level.texinfo \
-  type-index.texinfo \
-  user-preferences.texinfo
+  component-manager.texi \
+  concept-index.texi \
+  engine.texi \
+  fdl.texi \
+  function-index.texi \
+  intro.texi \
+  register.texi \
+  reports.texi \
+  top-level.texi \
+  type-index.texi \
+  user-preferences.texi
 
 # These should included as part of the automake rule set.  Perhaps I
 # have a version skew between automake and texinfo.

src/doc/design/gnucash-design.texi

@@ -221,17 +221,17 @@ User Preferences
 @end detailmenu
 @end menu
 
-@include fdl.texinfo
-@include intro.texinfo
-@include top-level.texinfo
-@include engine.texinfo
-@include component-manager.texinfo
-@include register.texinfo
-@include reports.texinfo
-@include user-preferences.texinfo
-@include function-index.texinfo
-@include type-index.texinfo
-@include concept-index.texinfo
+@include fdl.texi
+@include intro.texi
+@include top-level.texi
+@include engine.texi
+@include component-manager.texi
+@include register.texi
+@include reports.texi
+@include user-preferences.texi
+@include function-index.texi
+@include type-index.texi
+@include concept-index.texi
 
 @summarycontents
 @contents