Flag to not fail the revocation status when multiple CRL distribution points having same CRL.

[Yogi1994]

Problem:There are cases when there is same CRL hosted at multiple locations for high availability.
Some if the URLs(CRL Distribution points) may not be reachable. In this case, it is not required for the certificate to pass every CRL(as the CRL is same in every hosted location).
Solution: Verify at least 1 hosted location and not fail if host is not reachable.
If any of the URL is reachable and verified as not revoked then we should not reject the certificate.

[codecov-io]

Codecov Report

Merging #1180 (b1646d8) into master (c6f04ed) will decrease coverage by 0.02%.
The diff coverage is 57.14%.

@@            Coverage Diff             @@
##           master    #1180      +/-   ##
==========================================
- Coverage   54.66%   54.64%   -0.03%     
==========================================
  Files          77       77              
  Lines        6653     6663      +10     
==========================================
+ Hits         3637     3641       +4     
- Misses       2559     2562       +3     
- Partials      457      460       +3     

Impacted Files	Coverage Δ
revoke/revoke.go	60.78% <57.14%> (-0.18%)	⬇️
csr/csr.go	78.44% <0.00%> (-0.73%)	⬇️
api/client/client.go	54.03% <0.00%> (-0.34%)	⬇️

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[Yogi1994]

@nickysemenza, @maxnystrom , @mihirjham , @cbroglie

[jovillas]

Any update on this?