Merge branch 'bc/sha-256-cvs-svn-updates'

CVS/SVN interface have been prepared for SHA-256 transition * bc/sha-256-cvs-svn-updates: git-cvsexportcommit: port to SHA-256 git-cvsimport: port to SHA-256 git-cvsserver: port to SHA-256 git-svn: set the OID length based on hash algorithm perl: make SVN code hash independent perl: make Git::IndexInfo work with SHA-256 perl: create and switch variables for hash constants t/lib-git-svn: make hash size independent t9101: make hash independent t9104: make hash size independent t9100: make test work with SHA-256 t9108: make test hash independent t9168: make test hash independent t9109: make test hash independent