Replace SUBLANG_DEFAULT with the specific SUBLANG_XXX constant for languages that have multiple sublanguages.

msvcrt/tests: The tests must not include msvcrt.h because it contains declarations that may be incompatible with the PSDK headers.

There is no guarantee that the compiler will compute the function arguments in left-to-right order.

handled at the binding level now instead of the message level, so
remove this special handling in RPCRT4_Send.

rpcrt4: Allow applications to specify authentication levels other than connect in RpcBindingSetAuthInfoA/W.

Map the default authentication level and service to sane values.
Don't create an RpcAuthInfo object if RPC_C_AUTHN_LEVEL_NONE is specified.