Merge branch 'ak/curl-imap-send-explicit-scheme'

When we started cURL to talk to imap server when a new enough version of cURL library is available, we forgot to explicitly add imap(s):// before the destination. To some folks, that didn't work and the library tried to make HTTP(s) requests instead. * ak/curl-imap-send-explicit-scheme: imap-send: Tell cURL to use imap:// or imaps://