dev-libs/cyrus-sasl has a bug that causes httpd from cyrus-imapd to crash with SIGFPE with a default configuration (that is, without adding additional "sasl_reauth_timeout: 1" setting to imapd.conf; see this bug URL). Upstream has fixed this bug with commit https://github.com/cyrusimap/cyrus-sasl/commit/76ce885a44e7cb511ba54ceae46349036abb9cc8 in 2013, however cyrus-sasl hadn't had a release since 2012 so the most recent version available is still broken. That's why please include this patch in dev-libs/cyrus-sasl ebuild so httpd from cyrus-imapd won't crash without a non-obvious workaround setting.