dsound: Don't send notify events before played range.
wininet: Use a helper function to remove request headers.
wininet/tests: Add a test to show that the Content-Length header is not updated when a request is reused.
rpcrt4: Make sure the Content-Length header is set correctly when preparing the out pipe.
ntdll: Add stub for RtlSetHeapInformation.
kernel32/tests: Add tabular UTF-7 encoding tests.
kernel32/tests: Add tabular UTF-7 decoding tests.
kernel32: Support UTF-7 in WideCharToMultiByte.

Portions of utf7_wcstombs were written by Sebastian Lackner
<sebastian@fds-team.de>
kernel32: Support UTF-7 in MultiByteToWideChar.

Portions of utf7_mbstowcs were written by Sebastian Lackner
<sebastian@fds-team.de>