dcerpc 0.2.7

Pure-Rust DCE/RPC (MS-RPCE): hand-rolled NDR marshaling, PDUs, NTLMSSP sign+seal (packet privacy), TCP + SMB named-pipe transports, EPM, and SAMR/LSAT/DRSUAPI/SVCCTL/RRP/Netlogon/DCOM-WMI clients — no FFI