expat-2.6.1

[Bruce Dubbs]

New point version.

[Xi Ruoyao]

Release 2.6.1 Thu February 29 2024 
        Bug fixes:
            #817  Make tests independent of CPU speed, and thus more robust
       #828 #836  Expose billion laughs API with XML_DTD defined and
                    XML_GE undefined, regression from 2.6.0

        Other changes:
            #829  Hide test-only code behind new internal macro
            #833  Autotools: Reject expat_config.h.in defining SIZEOF_VOID_P
            #819  Address compiler warnings
       #832 #834  Version info bumped from 10:0:9 (libexpat*.so.1.9.0)
                    to 10:1:9 (libexpat*.so.1.9.1); see https://verbump.de/
                    for what these numbers do

        Infrastructure:
            #818  CI: Adapt to breaking changes in clang-format

[Bruce Dubbs]

Fixed at commits

    Update to iana-etc-20240222.
    Update to vim-9.1.0145.
    Update to xz-5.6.0.
    Update to tcl-8.6.14.
    Update to shadow-4.14.6.
    Update to setuptools-69.1.1.
    Update to linux-6.7.7.
    Update to libffi-3.4.6.
    Update to gettext-0.22.5.
    Update to expat-2.6.1.