Working plugin V1, with tests:
* check_distance: statistical distance from standard ciphersuite
* check_pfs_pref: verify that PFS is preferred
* check_pfs_keysize_dhe: check DHE keysize
* check_pfs_keysize_ecdhe: check ECDHE keysize
* check_tls_protocol: check TLS versions
* check_rc4_notfirst: verify that RC4 isn't the 1st cipher
* check_rc4_or_3des: check that either RC4 or 3DES is present