fixed the solaris pkcs12 build problem

                                  Changelog

Daniel (19 December 2004)

- I investigated our PKCS12 build problem on Solaris 2.7 with OpenSSL 0.9.7e,

  and it turned out to be the fault of the zlib 1.1.4 headers doing a typedef

  named 'free_func' and the OpenSSL headers have a prototype that uses

  'free_func' in one of its arguments. This is why the compile errors out.

  In other words, we need to include the openssl/pkcs12.h header before the

  zlib.h header and it builds fine. The configure script now checks for this

  file and it then gets included early in lib/urldata.h.

Daniel (18 December 2004)

- Samuel Listopad added support for PKCS12 formatted certificates.

Daniel (11 December 2004)

- Made the test suite HTTP server (sws) capable of using IPv6, and then

  extended the test environment to support that and also added three test

  cases (240, 241, 242) that run tests using IPv6. One of them uses a URL that

  cases (240, 241, 242) that run tests using IPv6. Test 242 uses a URL that

  didn't work before the 10 dec fix by Kai Sommerfeld.

- Made a failed file:// resume output an error message