Merge branch 'ef/msys-imap'

* ef/msys-imap: Windows: use BLK_SHA1 again MSVC: Enable OpenSSL, and translate -lcrypto mingw: enable OpenSSL mingw: wrap SSL_set_(w|r)fd to call _get_osfhandle imap-send: build imap-send on Windows imap-send: fix compilation-error on Windows imap-send: use run-command API for tunneling imap-send: use separate read and write fds imap-send: remove useless uid code