If DllMain is used, rely on it working as expected. The old code seemed
to attempt to free global state of other threads if, for some reason,
the DllMain mechanism didn't work.
In a static build, register a destructor with
RegisterWaitForSingleObject.
Make public functions xmlGetGlobalState and xmlInitializeGlobalState
no-ops.
Move initialization and registration of global state objects to
xmlInitGlobalState. Lookup global state with xmlGetThreadLocalStorage
which can be inlined nicely.
Also cleanup global state when using TLS. xmlLastError must be reset.
Private functions were previously declared
- in header files in the root directory
- in public headers guarded with IN_LIBXML
- in libxml.h
- redundantly in source files that used them.
Consolidate all private header files in include/private.
