Revert "Remove auth db crypto routines and lib linking (temporarily)"

This reverts commit c583f8d6256981e85f738bb5cfc4815a3a45034b.
More auth classes header cleanup
Clean up auth crypto class, removing cruft and unnecessary header loads
Convert crypto to QCA; remove Crypto++ use; add cached config removal
Update QCA CMake find script for Windows and general -nix
Merge branch 'master-2_6_0-auth' into master-2_6_0-auth-boundless