Base64 update to perlfaq9.pod

Message-ID: <lrlmpg9x6v.fsf@caliper.ActiveState.com>

p4raw-id: //depot/perl@9555

pod/perlfaq9.pod

@@ -388,13 +388,18 @@ with the characters reversed, one added or subtracted to each digit, etc.
 
 =head2 How do I decode a MIME/BASE64 string?
 
-The MIME-tools package (available from CPAN) handles this and a lot
-more.  Decoding BASE64 becomes as simple as:
+The MIME-Base64 package (available from CPAN) handles this as well as
+the MIME/QP encoding.  Decoding BASE64 becomes as simple as:
 
-    use MIME::base64;
+    use MIME::Base64;
     $decoded = decode_base64($encoded);
 
-A more direct approach is to use the unpack() function's "u"
+The MIME-Tools package (available from CPAN) support exctraction with
+decoding of BASE64 encoded attachments and content directly from email
+messages.
+
+If the string to decode is short (less than 84 bytes long)
+a more direct approach is to use the unpack() function's "u"
 format after minor transliterations:
 
     tr#A-Za-z0-9+/##cd;                   # remove non-base64 chars