Remove unneeded checks on the GetModuleHandle() return value for cases where we are linked with the dll.

rpcrt4: Fixing the using of the auth_len values the wrong way round - PKT_PRIVACY implies the packet will be encrypted, not just signed.

ole32: Do a case-insensitive comparison in the count_moniker_matches in the moniker tests as Win9x marshals an all upper-case file name for file monikers.

ole32: Pass the OXID info to RPC_CreateClientChannel and use this to pass the server process ID to channel hooks.

Based on patch by Henri Verbeet.

ole32: Handle NULL sub-objects correctly in the STGMEDIUM user marshaling functions so that no further data in marshaled or unmarshaled.

Previously it was hardcoded to 16, so only the NTLM provider would work correctly.

rpcrt4: Call CompleteAuthToken if InitializeSecurityContext returned a code that says it should be called.

Currently, the only security provider that requires this is the Digest 
one, which we don't really care about, but is supported for completeness.