Merge branch 'jk/imap-send-unused-variable-cleanup'

"imap-send" codepaths got cleaned up to get rid of unused parameters. * jk/imap-send-unused-variable-cleanup: imap-send: drop unused fields from imap_cmd_cb imap-send: drop unused parameter from imap_cmd_cb callback imap-send: use server conf argument in setup_curl()