dxdiagn: Fix the character count passed to snprintfW in DXDiag_AddFileDescContainer and DXDiag_InitDXDiagDisplayContainer.

dbghelp: Fix a typo in SymLoadModuleExW that caused the wrong number of characters to be passed to lstrcpynW.

advapi32: The lpcbSecurityDescriptor parameter to RegGetKeySecurity isn't optional, so don't complicate the code by treating as though it is.

This reverts commit 31876695.

Change the return value from BOOL to NTSTATUS so that we can return the 
exception code to the caller.

kernel32/tests: Fix the time tests when 'Automatically adjust clock for daylight saving changes' has been unset.

Make the test of the return value of wait_for_incoming_data less strict.

Since there is no in or out, or other information necessary for
remoting, all of the interfaces can only used locally, so declare them
all as local.