backward compatibility, but add preferred forms WARN_PHP_* and use
these ourselves.
Rename Lib/php4 to Lib/php, Source/Modules/php4.cxx to Source/Modules/php.cxx.
Add typemaps for const reference so Examples/test-suite/apply_signed_char.i
works.
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@10633 626c5289-ae23-0410-ae9c-e8d60b6d4f22
