Fix nameservice condition/error names; also revert some of r307: fast-unix-select *does* return errno, but change the code a bit to prevent the compiler from issueing warnings.
Fix nameservice condition/error names; also revert some of r307: fast-unix-select *does* return errno,
but change the code a bit to prevent the compiler from issueing warnings.

dkochmanski/usocket,lispnik/usocket,tmccombs/usocket