Tests: fixed auth_basic.t on OpenBSD. OpenBSD does not provide any crypt() schemes except bcrypt-based "$2" anymore. As such, relevant tests are now skipped not for win32 only, but based on crypt() results. Note that just testing crypt('password', 'salt') is not enough, since Perl on win32 provides its own crypt() implementation, which is able to handle traditional DES crypt(), but rejects "$1$".