This commit modifies run_fs() to show the signature algorithms the server supports in the ServerKeyExchange message for TLS 1.2 and in the CertificateVerify message for TLS 1.3.
Signature algorithms are not shown for TLS 1.1 and earlier, since for those protocol versions the signature algorithm to use is specified by the protocol. While the signature algorithm used in TLS 1.1 and earlier is weak, testssl.sh already warns if these protocol versions are supported.
This commit fileout() calls to ciphers_by_strength() and cipher_pref_check() to indicate whether or not the server enforces a cipher order for a protocol version.
See #2127. the line seems very long though.
Note: this was previously commited as #2184 but as there were two mistakes
and one other thing which could be improved I decided to make a hard reset.
Apologize if it caused inconvenience.
Respect changed HSTS epoch time of 180 days.
(DROWN output is changed too as the certificated changed but doesn't matter
as the travis check filters that)
