Fixes:
- php_mapi: cure crash occurring with mapi_getidsfromnames
- midb: resolve "inside a readonly TXN" warnings during message deletion
- exmdb: emit notifications only after SQL transactions are complete
- imap: resolve unstable EXPUNGE observability
Enhancements:
- exm2eml: do output named property map when -p is used
- exm2eml: show named property mnemonics when -p is used twice
- php_mapi: allow calling namedprop resolution functions with not just store objects, but also folder/message/attachment objects