Update expat

[sideshowbarker]

This change updates expat to the latest sources from the master branch at
https://github.com/libexpat/libexpat

Fixes #6

After this change, libwww still builds successfully in my environment, but I
don’t know if/how to test to make sure nothing has regressed...

[jkbzh]

Hi @sideshowbarker ,

Thanks for your PR. There is only one issue: you commited both the source code.. and binaries of expat. Could you do a make clean and then either a new PR or remove the binary files from the previous one so that only the pre-compile/pre-configuration source code is commited?

Thanks!

[hartwork]

If aim you at the Expat tarball file list for the modules/expat folder, this is the list of file additions/removals I would expect. It's that many because we dropped a few ancient build systems:

# diff -u0 <(tar tf expat-2.2.0.tar.bz2 | sed 's,^expat-2.2.0/,,' | sort) <(tar tf expat-2.2.1.tar.bz2 | sed 's,^expat-2.2.1/,,' | sort) | grep -v '@@'
--- /dev/fd/63  2017-06-21 16:50:33.711407462 +0200
+++ /dev/fd/62  2017-06-21 16:50:33.712407464 +0200
-amiga/
-amiga/expat_68k.c
-amiga/expat_68k.h
-amiga/expat_68k_handler_stubs.c
-amiga/expat_base.h
-amiga/expat_lib.c
-amiga/expat_vectors.c
-amiga/expat.xml
-amiga/include/
-amiga/include/inline4/
-amiga/include/inline4/expat.h
-amiga/include/interfaces/
-amiga/include/interfaces/expat.h
-amiga/include/libraries/
-amiga/include/libraries/expat.h
-amiga/include/proto/
-amiga/include/proto/expat.h
-amiga/launch.c
-amiga/Makefile
-amiga/README.txt
-bcb5/
-bcb5/all_projects.bpg
-bcb5/elements.bpf
-bcb5/elements.bpr
-bcb5/elements.mak
-bcb5/expat.bpf
-bcb5/expat.bpr
-bcb5/expat.mak
-bcb5/expat_static.bpf
-bcb5/expat_static.bpr
-bcb5/expat_static.mak
-bcb5/expatw.bpf
-bcb5/expatw.bpr
-bcb5/expatw.mak
-bcb5/expatw_static.bpf
-bcb5/expatw_static.bpr
-bcb5/expatw_static.mak
-bcb5/libexpat_mtd.def
-bcb5/libexpatw_mtd.def
-bcb5/makefile.mak
-bcb5/outline.bpf
-bcb5/outline.bpr
-bcb5/outline.mak
-bcb5/README.txt
-bcb5/setup.bat
-bcb5/xmlwf.bpf
-bcb5/xmlwf.bpr
-bcb5/xmlwf.mak
+AUTHORS
-examples/elements.dsp
-examples/outline.dsp
-expat.dsw
-lib/amigaconfig.h
-lib/expat.dsp
-lib/expat_static.dsp
-lib/expatw.dsp
-lib/expatw_static.dsp
-lib/macconfig.h
-lib/Makefile.MPW
+lib/siphash.h
+run.sh.in
-tests/benchmark/benchmark.dsp
-tests/benchmark/benchmark.dsw
+tests/memcheck.c
+tests/memcheck.h
-vms/
-vms/descrip.mms
-vms/expat_config.h
-vms/README.vms
-xmlwf/xmlwf.dsp

Best, Sebastian

PS: Note to self: libwww is using nested configure with libwww (AC_CONFIG_SUBDIRS).

[sideshowbarker]

Closing thing in favor of #8.