lib-ssl-iostream: Use SSL_MODE_RELEASE_BUFFERS if it exists to reduce memory usage.
lib-ssl-iostream: Use SSL_MODE_RELEASE_BUFFERS if it exists to reduce memory usage.

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch