Update to 1.48
    
    - New upstream release 1.48
      - removed unneeded Debian_CPANTS.txt from MANIFEST
      - fixed incorrect documentation about the best way to call CTX_set_options
      - fixed problem that caused "Undefined subroutine utf8::encode" in
        t/local/33_x509_create_cert.t (on perl 5.6.2)
      - in examples and pod documentation, changed #!/usr/local/bin/perl to
        #!/usr/bin/perl
      - t/local/06_tcpecho.t now tries a number of ports to bind to until
        successful
    - No longer need to fix shellbangs in examples