Prompted by CVE-2021-3541, but this includes an awful lot of serious bug
fixes by Nick and others.
- configure.ac: bumped to new release
- doc/* updated and regenerated
commit c71f9305a99b6aa03cb08fab31106c9c56f1be4f added __XML_EXTERNC
cpp construct which not understood by apibuild, leading to make dist
failures, ask to ignore that construct.
Various cleanups
* configure.in: force regeneration of APIs in my environment
* buf.c buf.h enc.h encoding.c include/libxml/tree.h
include/libxml/xmlerror.h save.h tree.c: various comment cleanups
pointed by apibuild
* doc/apibuild.py: added the 3 new internal headers in the excludes
* doc/libxml2-api.xml doc/libxml2-refs.xml: regenerated the API
* doc/symbols.xml: listing new entry points for 2.9.0
* doc/devhelp/*: regenerated
* libxml.spec.in doc/devhelp/*: finished the integration with
devhelp, completing the index and inserted into the gtk-doc
database at "make install" stage
Daniel
