* Now that we can delay-load DLLs for both MinGW and MSVC, we can also remove
the direct DLL hook that was added into dwmapi.dll due to side loading and
revert to using a direct API call instead.
* This reverts part of e1d864f755.
* Also attempt to silence that damn Coverity warning.
* Now that we can delay-load DLLs for both MinGW and MSVC, we can remove the
cumbersome direct DLL hooks into wininet.dll (which is vulnerable to side
loading when not delay-loaded) and revert to using direct API calls instead.
* This reverts part of e1d864f755.
* Also attempt to silence a Coverity warning.
* This reverts much of commits f6ac559f4d and 1947266837
so that we call the Windows APIs directly again, while ensuring that, by the time we load the DLLs,
sideloading mitigation has already been applied by the application.
* This is a continuation of #1877, and should help prevent re-introducing side-loading issues when we
link against new libraries, as well as allow us to drop some of the manual DLL hooking we've been
doing to prevent it, to clean up the code.
* Note that this is a bit more complex than what the stackoverflow post suggests, because we need to
create delayloaded libs for both 32-bit and 64-bit, which use a different calling convention and
therefore need to use different .def files. So there's a lot of gymkhana involved, with Makefiles
and whatnot, to get us there.
* Also simplify the use of CM_Get_DevNode_Registry_PropertyA() in dev.c since recent versions of
MinGW now have support for it.
* Also fix 2 small issues in net.c (potential overflow) and format.c (memory leak).
