Bug 826118 - [email/IMAP] Connection loss may not always result in error messages during synchronization, synchronization for the folder will break until app is restarted.
IMAP server jobs need the deathback updated/cleared too.
Add withConnection and resetErrorHandling to imap/folder, to help the use of folderConn in _accessFolderForMutation to be less aware of the actual deathback setting and reseting
Use clearErrorHandler instead of resetErrorHandling
Merge pull request #160 from jrburke/bug826118_imaploss

Bug 826118 - [email/IMAP] Connection loss may not always result in error messages during synchronization, synchronization for the folder will break until app is restarted. r=squib
Merge remote-tracking branch 'upstream/master' into worker-thread

Conflicts:
	test/unit/resources/fault_injecting_socket.js
Merge remote-tracking branch 'gh-asuth/worker-thread-build' into worker-thread
fix naive test_imap_errors merge test failure