idn stuff in code and configure script

                                  Changelog

Daniel (27 April 2004)

- I remodeled Gisle's IDN code slightly and now we convert both the host name

  and proxy name to the ACE encoded version to use internally for resolves and

  cookies etc. They are now using one 'struct hostname' each that keep both

  the original name and the possibly encoded name. IDN resolves work for me

  now using ipv6, ipv4 and ares resolving. Even cookies on IDN sites seem to

  do right. I got some failures at first when CHARSET wasn't set at all which

  confused libidn completely and it decided by encoding of choice was

  'ANSI_X3.4-1968'...

- made 'configure --without-libidn' work

Daniel (25 April 2004)

- Fixed the src/hugehelp.c file to include "setup.h" instead of "config.h" to

  make the problems with USE_MANUAL on windows go away.

- configure --without-ssl could still wrongly include some OpenSSL info in the

  Makefiles if pkg-config had info about OpenSSL.

  Makefiles if pkg-config had info about OpenSSL. Bug #941762 reported by

  Martin.

- Since we can now build and use quite a large set of 3rd party libraries, I

  decided I would make configure produce a summary at the end showing what