HTTPhandler

* Allows access to web-hosted files via a virtual HTTP: device.
* Also supports secure sites with AmiSSL and a virtual HTTPS: device.
* Basic authentication supported using an addressing scheme like
"http://user:pass()www.domain.com"
* Supports Open(), Read(), Close() and Seek().
* Implements HTTP redirects (301,302,307) as soft-links - even works with
redirects that point to local files.
* Optionally supports gzip content-encoding for faster download times, if
z.library is installed.
* Will work through a proxy server.
* Can connect to HTTP services running on ports other than the default.

History:

1.11 (06.06.2022)
* Jubilee edition :)
* Updated for AmiSSL v5

1.10 (24.3.2017)
* Tenth anniversary version :)
* Updated for new SDK, now uses newlib and AmiSSL v4

1.9 (28.01.2007)
* Fixed Seek(), which I broke in some past version.
* Added proxy authentication (not tested).  NB: You must now add http:// to the
start of your proxy server name!

1.8 (17.12.2006)
* Added basic authentication using http://user:pass()domain notation.

1.7 (07.09.2006)
* Fixed a memory leak on exit.

1.6 (30.08.2006)
* No longer accepts deflate encoding, as the specification has been
misinterpreted and, although I asked for gzip in preference, was still getting
headerless deflate data instead.
* Some files were being copied down incomplete, was affecting chunked zlib data
and zlib data with a content-length specified, fixed these and also removed the
EOF check as the server terminates the connection when EOF is reached, making
this code unnecessary.

1.5 (26.08.2006)
* Changed Startup variable parsing to that used for the v2 betas - timeout is
now configurable
* Added a custom packet 2050 to get the headers of a URL
* Now also supports 307 redirects

1.4 (29.07.2006)
* Added HTTPS support using AmiSSL v3
* Increased timeout to five seconds

1.3 (21.02.2006)
* z.library was still being used even if the interface didn't open
* bug meant that the timeout wasn't being set, now times out after three seconds
of inactivity
* removed most of the debugging output
* tidied up the source

1.2 (19.02.2006)
first release

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