curl.h: include sys/select.h for NuttX RTOS

Closes #7287

curl.h: remove the execution bit

The execution bit of curl.h file was wrongly added:

commit 2621025d6f96 ("curl.h: <sys/select.h> is supported by VxWorks7")

and should be

curl.h: remove the execution bit

The execution bit of curl.h file was wrongly added:

commit 2621025d6f96 ("curl.h: <sys/select.h> is supported by VxWorks7")

and should be removed.

Follow-up to 2621025d6f96 ("curl.h: <sys/select.h> is supported by VxWorks7")
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Closes #7286

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curl.h: <sys/select.h> is supported by VxWorks7

Closes #7285

quiche: use send() instead of sendto() to avoid macOS issue

sendto() always returns "Socket is already connected" error on macos

Closes #7260

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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hostip: (macOS) free returned memory of SCDynamicStoreCopyProxies

From Apples documentation on SCDynamicStoreCopyProxies, "Return Value: A
dictionary of key-value pairs that represent th

hostip: (macOS) free returned memory of SCDynamicStoreCopyProxies

From Apples documentation on SCDynamicStoreCopyProxies, "Return Value: A
dictionary of key-value pairs that represent the current internet proxy
settings, or NULL if no proxy settings have been defined or if an error
occurred. You must release the returned value."

Failure to release the returned value of SCDynamicStoreCopyProxies can
result in a memory leak.

Source: https://developer.apple.com/documentation/systemconfiguration/1517088-scdynamicstorecopyproxies

Closes #7265

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RELEASE-NOTES: synced

vtls: fix warning due to function prototype mismatch

b09c8ee changed the function prototype. Caught by Visual Studio.

curl_multibyte: Remove local encoding fallbacks

- If the UTF-8 to UTF-16 conversion fails in Windows Unicode builds then
no longer fall back to assuming the string is in a local encodi

curl_multibyte: Remove local encoding fallbacks

- If the UTF-8 to UTF-16 conversion fails in Windows Unicode builds then
no longer fall back to assuming the string is in a local encoding.

Background:

Some functions in Windows Unicode builds must convert UTF-8 to UTF-16 to
pass to the Windows CRT API wide-character functions since in Windows
UTF-8 is not a valid locale (or at least 99% of the time right now).

Prior to this change if the Unicode encoding conversion failed then
libcurl would assume, for backwards compatibility with applications that
may have written their code for non-Unicode builds, attempt to convert
the string from local encoding to UTF-16.

That type of "best effort" could theoretically cause some type of
security or other problem if a string that was locally encoded was also
valid UTF-8, and therefore an unexpected UTF-8 to UTF-16 conversion
could occur.

Ref: https://github.com/curl/curl/pull/7246

Closes https://github.com/curl/curl/pull/7257

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curl_endian: remove the unused Curl_write64_le function

The last usage was removed in cca455a36

Closes #7280

vtls: only store TIMER_APPCONNECT for non-proxy connect

Introducing a 'isproxy' argument to the connect function so that it
knows wether to store the time stamp or not.

Reported

vtls: only store TIMER_APPCONNECT for non-proxy connect

Introducing a 'isproxy' argument to the connect function so that it
knows wether to store the time stamp or not.

Reported-by: Yongkang Huang
Fixes #7274
Closes #7274

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gnutls: set the preferred TLS versions in correct order

Regression since 781864bedbc57 (curl 7.77.0)

Reported-by: civodul on github
Assisted-by: Nikos Mavrogiannopoulos
Fixe

gnutls: set the preferred TLS versions in correct order

Regression since 781864bedbc57 (curl 7.77.0)

Reported-by: civodul on github
Assisted-by: Nikos Mavrogiannopoulos
Fixes #7277
Closes #7278

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configure/cmake: remove checks for unused gethostbyaddr and gethostbyaddr_r

Closes #7276

configure/cmake: remove checks for unused inet_ntoa and inet_ntoa_r

Closes #7276

configure/cmake: remove unused define HAVE_PERROR

Closes #7276

configure: remove unused check for gai_strerror

Closes #7276

configure/cmake: remove unused define HAVE_FREEIFADDRS

Closes #7276

configure/cmake: remove unused define HAVE_FORK

Closes #7276

configure/cmake: remove unused define HAVE_FDOPEN

Closes #7276

configure/cmake: remove checks for unused sgtty.h

Closes #7276

configure/cmake: remove remaining checks for rsa.h

Closes #7276

configure/cmake: remove remaining checks for err.h

Closes #7276

configure/cmake: remove remaining checks for crypto.h

Closes #7276

configure/cmake: remove checks for unused getservbyport_r

Closes #7276

--socks4[a]: clarify where the host name is resolved

Closes #7273