decode2text.sh: Assume xmlunzip exists in the same directory as this script. This avoids hardcoding /usr/local/libexec/dovecot/ path in it.

decode2text: Avoid leaving temp files and hanging child processes.

decode2text.sh: Hide catdoc/catppt/xls2csv segmentation faults. We can't do anything about them anyway.

decode2text.sh: Exit with 0 even if the decoding failed. There's nothing to be done anyway, since they are external programs. These errors just flood the error log unnecessarily.

decode2text: If unzip fails, just ignore the attachment silently.

decode2text: Ignore any errors from pdftotext

fts: decode2text.sh now ignores any errors from doc/xls/ppt decoders.

fts: Added a bit more error checking to decode2text.sh

fts: Install decode2text to libexecdir.

fts: decode2text added support for openxml and opendocument formats

fts: Added attachment decoding via an external script.