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.

This reduces the amount of code and ensures that the parameters passed 
to it stay the same, apart from the previous context and the output 
buffer description.

rpcrt4: Retrieve the maximum token length from the security provider rather than using a hardcoded and rather small limit.

Copy the OXID_INFO from the stub manager, if available, in 
proxy_manager_construct. Otherwise, attempt to resolve it.

Use ipidRemUnknown from OXID_INFO in the proxy manager instead of 
magically generating the IPID for RemUnknown.