Add HSBuild build files
Fix time_t issue on MSVC where time_t is 64 bit
Omit fatal MessageBox on Windows in Debug configuration
Add g_assertion_set_handler for setting a custom handler
Add a GModule workaround for iOS/dyld_shared_cache

System libraries are typically in the dyld_shared_cache, and thus
don't reside on the filesystem.
Add workaround for lack of G_GNUC_NORETURN
gsocket: Improve default UDP behavior on Windows

An ICMP port unreachable will result in a socket error, which is a
really bad default for UDP sockets.
GMain: Replace Windows implementation of g_get_current_time

Use QueryPerformanceCounter instead of GetSystemTimeAsFileTime. Only use
the latter for the starting point. Avoids burning precious CPU-cycles
with GTimeoutSource because of GetSystemTimeAsFileTime's low resolution,
which is 15 ms at best.
Fix declaration after statement
Avoid passing uninitialized sockaddr_storage to WSAAddressToString
Fix conditional G_OS_WIN32 includes
Fix C99isms in GRegistrySettingsBackend
GSocket: Don't bother updating select mask if socket is closed
Don't call WSAEnumNetworkEvents if socket is closed.

Makes Application Verifier happy.
Don't scan for modules if GLib is a static library
Add GWin32Dispatcher for message pump integration

Integrating an external main loop with the Windows message pump is
anything but trivial. This is primarily because DispatchMessage()
may block, leaving GMainContext to starve indefinitely. The most
common example is in a UI application while resizing a toplevel
window.  Windows will in this case, as part of its message handling
when the resize is started, start a nested message pump which processes
messages until the user chooses to let go in order to accept the new
window size.
gstdio: make it so GStatBuf and g_stat match up on Win64
Embed proxy-libintl

Enabled if configured with `--enable-proxy-libintl`.
autotools: Make it possible to disable building of tests
Add FFI_BUILDING to gobject's preprocessor defines

This should later be fixed in HSBuild instead, which should pick out
defines from Cflags.