[Code Cleanup] 'me' is no longer a stop word in search indexing since this made it harder to search for 'Contact me:' prefixes in subjects.
* [Mail/HTML] When HTML messages are converted to plaintext, lists (UL and OL) now have their items prefixed with a '*' bullet point.  Previously these were just being converted into sentences, which lost some readability.
* [Search/Mail] The search indexes for 'Message Content' now include the text from the subject line.  This makes it easier to use the same filter for matching the subject or message body.
* [Search/Mail] When a worker uses the 'Message Content' filter on ticket or message worklists, the search terms will now automatically be phrase quoted if they don't contain any spaces, quotes, or wildcards.  This should dramatically improve both the performance and relevancy of searches for terms like email addresses, domains, URLs, phone numbers, IP addresses, etc.  Previously, an email address like 'jeff@cerbweb.com' without quotes was being parsed as 'jeff OR cerbweb OR com', which is neither intuitive or particularly relevant.
* [Search/Mail] When a worker uses the 'Message Content' filter on ticket or message worklists and includes quoted phrases as search terms, the terms will have stop-words (e.g. the, an, by) removed so that they match the search index exactly.  This should significantly improve the relevancy of results for these types of searches.
* [CHD-3067] [Search/Snippets] Fixed an issue where Search->Snippet worklists for some users became unusable if they had contained previously deprecated filters.
* [Parser/Localization] The parser can now detect the encoding of text if none is given.  This is particularly useful when extracting part of a message (e.g. an inline bounce) that may not have been encoded properly.  For instance, some inline bounces (*cough* Exchange) may be in UTF-8 when their envelope is in a different encoding.
* [CHD-3655] [Parser/Localization] When invalid characters are encountered by the mail parser and the iconv extension is used, they will now either be converted or ignored.  Previously they were displaying a PHP notice and truncating the content.
* [Mail/Parser/Usability] When a mail server (e.g. Exchange) sends an inline copy of the full message source from a bounced message, Cerb will now automatically convert it to an attachment, and correct the encoding if necessary.
6.6.2-checkpoint
Merge branch '6.6.2' into stable