Update to 1.61
    
    - New upstream release 1.61
      - Fixed a typo in an error message
      - Fixed a problem with building with openssl that does not support OCSP
      - Fixed some newly introduced warnings if compiled with -Wall
      - Fixed format string issue causing build failures
      - Changed calloc to Newx and free to Safefree, otherwise there might be
        problems because calloc is done from a different memory pool than free
        (depends on the build options for perl, but seen on Windows)