Relax some SHA2 ciphersuite's version requirements

Changed:
- PSK ciphersuites (RFC 5487, section 3)
- ECDHE-PSK ciphersuites (RFC 5489, section 3)
- Additional Camellia ciphersuites (RFC 6367, sec 3.3)

Unchanged:
- all GCM ciphersuites
- Camellia ciphersuites from RFC 5932 (sec. 3.3.2)
- ECC-SHA2 ciphersuites from RFC 5289 (unclear)
- SHA2 from RFC 5246 (TLS 1.2, no precision)
2 files changed