Gromox 2.43

Fixes:

• imap: reduce memory footprint when FETCHing messages
• imap: resolve shutdown ordering crash
• exmdb: upgrade 0-length PR_ENTRYIDs to fake 1 byte to soothe Outlook Cached Mode syncer
• ews: heed MAPI proptype semantics and interpret 0xffffffff as a signed int when serializing to XML (-1 rather than 4294967295)
• gab: resolve out-of-bounds access in dntomid

Enhancements:

• oxm2mt: support embedded messages
• oxm2mt: add option to extract just an attachment embedded message
• eml2mt: add option to extract just an attachment embedded message
• mysql_adaptor: add TLS connection config directives

Behavioral changes:

• exmdb: launch threads in more rapid succession when there is job queue contention