Log Message:
pine-pgp-filters: update to 1.8.

----- July 2010 - Version 1.8 released -----

3. Complete overhaul of ppf_mime. Determine the MIME message boundary
   using more reliable (albeit more complex) means, and special case
   a lot of client behavior to allow verification of a wider variety
   of messages. For display, de-code more of the MIME en-coding so that
   the messages are much more readable. Use the same tricks to display
   decrypted messages in ppf_mime_decrypt.

   These changes have several major benefits:
   a. Support for PGP/MIME  messages generated by well over a dozen MUAs.
   b. Support for verifying signatures on attachments, and a clear
      indication that attachments are signed (or not).
   c. Greatly improved readability. With the exception of text coloring
      (URLs, signatures, etc.), 8-bit characters, and some types of
      messages sent with format=flowed, messages displayed by the filter
      are identical to the display in Alpine.

2. For ppf_{decrypt|encrypt|sign|verify} add 'clear' commands so that
   nothing is left behind in the "user interface" area between scripts.
   For _verify, add a message indicating that we are verifying, along
   with a helpful hint about delays caused by auto-key-retrieve.

1. Add /opt/bin and /opt/local/bin to the gpg[2] search path in configure
   in case it is located there, and that's not going to be $PREFIX.

----- April 2010 - Version 1.7 released -----

2. Add support for the OpenPGP header in ppf_sign and ppf_encrypt, and
   use the same method to sanitize the key ID as was already done for
   the other headers.

1. Use a more reliable method to find the signature and message parts
   in the ppf_mime script.