Add comment that BIND-ARGS is broken in similar ways as was DS-BIND.
Name the RAW-SLOT-DATA-COMPARER functions human-readably.
Cleanup some obsolete SB-UNIX symbols from package-data-list

Terminal/keyboard ioctls are not used anywhere in Lisp,
and sgtty was superseded by termios long ago.
O_NOCTTY is needed and is moved with the other O_ flags.
SB-MKSTEMP was listed twice.
Silence a bunch of C compiler diagnostics