Improve CMS/Kerberos support of other hashes

[gpotter2]

This PR:

• merges the different "Hash" crypto implementations of TLS and IPSEC/RFC3961
• fixes support for non-sha1 hashes in CMS
• improve PKINIT support
• fix p12= being broken in KerberosClient

[codecov]

Codecov Report

❌ Patch coverage is 52.63158% with 90 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.27%. Comparing base (f6793df) to head (19c132f).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
scapy/layers/kerberos.py	9.37%	58 Missing ⚠️
scapy/layers/tls/cert.py	52.38%	20 Missing ⚠️
scapy/layers/tls/crypto/hash.py	85.71%	6 Missing ⚠️
scapy/layers/windows/registry.py	0.00%	5 Missing ⚠️
scapy/layers/tls/crypto/prf.py	92.85%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4974      +/-   ##
==========================================
- Coverage   80.31%   80.27%   -0.05%     
==========================================
  Files         381      381              
  Lines       93630    93716      +86     
==========================================
+ Hits        75201    75232      +31     
- Misses      18429    18484      +55     

Files with missing lines	Coverage Δ
scapy/asn1/mib.py	91.87% <ø> (ø)
scapy/layers/gssapi.py	84.67% <100.00%> (ø)
scapy/layers/tls/crypto/h_mac.py	92.85% <100.00%> (+0.21%)	⬆️
scapy/layers/tls/crypto/hkdf.py	98.11% <100.00%> (ø)
scapy/layers/tls/crypto/pkcs1.py	76.27% <100.00%> (-0.48%)	⬇️
scapy/layers/tls/crypto/suites.py	100.00% <100.00%> (ø)
scapy/layers/windows/erref.py	100.00% <ø> (ø)
scapy/modules/ticketer.py	46.01% <ø> (ø)
scapy/layers/tls/crypto/prf.py	92.50% <92.85%> (ø)
scapy/layers/windows/registry.py	0.00% <0.00%> (ø)
... and 3 more

... and 6 files with indirect coverage changes

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