Bug Fixes:
Bug 780617 - [IMAPx] Allow FETCH response split into multiple lines (Milan Crha)
Bug 777161 - [CalDAV] Deadlock after refresh of OAuth2 token (Milan Crha)
Miscellaneous:
Revert "Disable support for all POP3 extensions by default" (Milan Crha)
Fix maybe-used-uninitialized compiler warning from camel-pop3-folder.c (Milan Crha)
Fix few Coverity scan issues (Milan Crha)