sslutil: move CA file processing into _hostsettings()...
sslutil: move CA file processing into _hostsettings()
The CA file processing code has been moved from _determinecertoptions
into _hostsettings(). As part of the move, the logic has been changed
slightly and the "cacerts" variable has been renamed to "cafile" to
match the argument used by SSLContext.load_verify_locations().
Since _determinecertoptions() no longer contains any meaningful
code, it has been removed.