[sylpheed:35294] Feature request: backgrounding of IMAP transactions

[Dennis Carr]

Problem: If somebody engages in certain IMAP transactions, this will
cause Sylpheed to be unesponsive; a user si not able to interact with
the program other than certain functions such as scrolling, opening
logs, or composing mail.  That is, they can't navigate

Solution: process these IMAP transactions in a background "forked"
process.

-Dennis