RPC handling

RPCs sent to remote servers can contain parameters of types CS_LONGCHAR and CS_LONGBINARY. The CIS command cis_rpc_handling supports these new types.

Note that sending long parameters to pre-12.5 servers is not allowed, as prior versions of Adaptive Server Enterprise do not support CS_LONGCHAR or CS_LONGBINARY data. CIS examines TDS capabilities for the remote server prior to sending the RPC, and if the remote server cannot accept these datatypes, an error results.