Revert "build: remove checks for WinSock 1"

Due to CI issues

This reverts commit c2ea04f92b00b6271627cb218647527b5a50f2fc.

Closes #7790

build: remove checks for WinSock 1

It's not supported anymore.

Closes https://github.com/curl/curl/pull/7778

curl_setup.h: sync values for HTTP_ONLY

The values for HTTP_ONLY differed between CMakeLists.txt and
curl_setup.h. Sync them and sort the values in curl_setup.h to make it
easier to

curl_setup.h: sync values for HTTP_ONLY

The values for HTTP_ONLY differed between CMakeLists.txt and
curl_setup.h. Sync them and sort the values in curl_setup.h to make it
easier to spot differences.

Closes #7601

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mbedtls: Remove unnecessary include

- curl_setup.h: all references to mbedtls_md4* functions and structures
are in the md4.c. This file already includes the <mbedtls/md4.h> file

mbedtls: Remove unnecessary include

- curl_setup.h: all references to mbedtls_md4* functions and structures
are in the md4.c. This file already includes the <mbedtls/md4.h> file
along with the file existence control (defined (MBEDTLS_MD4_C))

- curl_ntlm_core.c: unnecessary include - repeated below

Closes #7419

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cmake: fix support for UnixSockets feature on Win32

Move the definition of sockaddr_un struct from config-win32.h to
curl_setup.h, so that it could be shared by all build systems.

cmake: fix support for UnixSockets feature on Win32

Move the definition of sockaddr_un struct from config-win32.h to
curl_setup.h, so that it could be shared by all build systems.

Add ADDRESS_FAMILY typedef for old mingw, now old mingw can also use
unix sockets.

Also fix the build of tests/server/sws.c on Win32 when USE_UNIX_SOCKETS
is defined.

Closes #7034

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warnless: simplify type size handling

By using sizeof(T), existing defines and relying on the compiler to
define the required signed/unsigned mask.

Closes #7181

define: re-add CURL_DISABLE_NTLM and corresponding ifdefs

This flag will be further exposed by adding build options.

Reverts #6809
Closes #7028

lib/hostip6.c: make NAT64 address synthesis on macOS work

Closes #7121

cmake: detect CURL_SA_FAMILY_T

Fixes #7049
Closes #7065

config: remove now-unused macros

Closes #7094

tls: add USE_HTTP2 define

This abstracts across the two HTTP/2 backends: nghttp2 and Hyper.

Add our own define for the "h2" ALPN protocol, so TLS backends can use
it without dep

tls: add USE_HTTP2 define

This abstracts across the two HTTP/2 backends: nghttp2 and Hyper.

Add our own define for the "h2" ALPN protocol, so TLS backends can use
it without depending on a specific HTTP backend.

Closes #6959

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curl_setup: provide the shutdown flags wider

By using #ifdef on the symbol names to work on anything that don't
provide them. SCO OpenServer 5.0.7, sys/socket.h does not define either

curl_setup: provide the shutdown flags wider

By using #ifdef on the symbol names to work on anything that don't
provide them. SCO OpenServer 5.0.7, sys/socket.h does not define either
SHUT_RDWR, SHUT_RD, and SHUT_WR.

Reported-by: Kevin R. Bulgrien
Bug: https://curl.se/mail/lib-2021-04/0073.html
Closes #6925

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define: remove CURL_DISABLE_NTLM ifdefs

It was never defined anywhere. Fixed disable-scan (test 1165) to also
scan headers, which found this issue.

Closes #6809

config: fix detection of restricted Windows App environment

Move the detection of the restricted Windows App environment
in curl_setup.h before the definition of USE_WIN32_CRYPTO
via

config: fix detection of restricted Windows App environment

Move the detection of the restricted Windows App environment
in curl_setup.h before the definition of USE_WIN32_CRYPTO
via included config-win32.h in case no build system is used.

Reviewed-by: Marcel Raad

Part of #6277

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config: remove CURL_SIZEOF_CURL_OFF_T use only SIZEOF_CURL_OFF_T

Make the code consistently use a single name for the size of the
"curl_off_t" type.

Closes #6702

vtls: initial implementation of rustls backend

This adds a new TLS backend, rustls. It uses the C-to-rustls bindings
from https://github.com/abetterinternet/crustls.

Rustls is a

vtls: initial implementation of rustls backend

This adds a new TLS backend, rustls. It uses the C-to-rustls bindings
from https://github.com/abetterinternet/crustls.

Rustls is at https://github.com/ctz/rustls/.

There is still a fair bit to be done, like sending CloseNotify on
connection shutdown, respecting CAPATH, and properly indicating features
like "supports TLS 1.3 ciphersuites." But it works well enough to make
requests and receive responses.

Blog post for context:
https://www.abetterinternet.org/post/memory-safe-curl/

Closes #6350

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file: Support unicode urls on windows

Closes https://github.com/curl/curl/pull/6501

curl_setup: USE_RESOLVE_ON_IPS is for Apple native resolver use

... so don't define it when instructed to use c-ares!

curl: add compatibility for Amiga and GCC 6.5

Changes are mainly reordering and adding of includes required
to compile with a more recent version of GCC.

Closes #6220

curl.se: new home

Closes #6172

symbian: drop support

The OS is deprecated. I see no traces of anyone having actually built
curl for Symbian after 2012.

The public headers are unmodified.

Closes #5989

win32: drop support for WinSock version 1, require version 2

IPv6, telnet and now also the multi API require WinSock
version 2 which is available starting with Windows 95.

There

win32: drop support for WinSock version 1, require version 2

IPv6, telnet and now also the multi API require WinSock
version 2 which is available starting with Windows 95.

Therefore we think it is time to drop support for version 1.

Reviewed-by: Marcel Raad
Reviewed-by: Jay Satiro
Reviewed-by: Daniel Stenberg
Reviewed-by: Viktor Szakats

Follow up to #5634
Closes #5854

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ntlm: fix condition for curl_ntlm_core usage

`USE_WINDOWS_SSPI` without `USE_WIN32_CRYPTO` but with any other DES
backend is fine, but was excluded before.

This also fixes test

ntlm: fix condition for curl_ntlm_core usage

`USE_WINDOWS_SSPI` without `USE_WIN32_CRYPTO` but with any other DES
backend is fine, but was excluded before.

This also fixes test 1013 as the condition for SMB support in
configure.ac didn't match the condition in the source code. Now it
does.

Fixes https://github.com/curl/curl/issues/1262
Closes https://github.com/curl/curl/pull/5771

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configure: cleanup wolfssl + pkg-config conflicts when cross compiling.

Also choose a different wolfSSL function to test for NTLM support.

Fixes #5605
Closes #5682

multibyte: Fixed access-> waccess to file for Windows Plarform

Reviewed-by: Marcel Raad
Closes #5580