On svn-auth-x509 branch: Revert r1616093 (svn_checksum_to_cstring_display2 
implementation) -- it's out of the scope of svn-auth-x509 branch and I 
develop local x509 implementation for formatting cert fingerprints.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/svn-auth-x509@1617088 13f79535-47bb-0310-9956-ffa450edef68