Rob W. W. Hooft's spelling fixes for the Library Reference. I hope

SourceForge doesn't choke on this batch :-)

I'm not entirely sure this is 100% correct. The patch changes an
\index{persistency} to \index{presistence}, and I don't know what \index{}
does. But it seems to do so persi--er, consistently, so I hope it isn't a
problem.

Doc/lib/libsmtplib.tex

@@ -56,7 +56,7 @@ A nice selection of exceptions is defined as well:
 
 \begin{excdesc}{SMTPRecipientsRefused}
   All recipient addresses refused.  The errors for each recipient are
-  accessable through the attribute \member{recipients}, which is a
+  accessible through the attribute \member{recipients}, which is a
   dictionary of exactly the same sort as \method{SMTP.sendmail()}
   returns.
 \end{excdesc}